Back in December a report entitled Meeting the UK aviation target – options for reducing emissions to 2050 was published by the Committee on Climate Change (CCC) to suggest that UK demand for flights could increase by 60% by 2050 and stay within the Government's emissions target of no increase above 2005 level.
This is at odds with what I have been saying about the need to reduce rather than increase flying. How come I seem to be at odds with the CCC?
Firstly, the report was commissioned to report on the feasibility of containing aviation emissions in 2050 to 2005 levels. The thinking is that if the target of total UK emissions cuts of 80% is to be met, no cuts in aviation emissions are required if non-aviation emissions are cut by a correspondingly larger amount - say by 85%. I don't find this argument very persuasive. Suppose that by 2040 we have achieved an 80% reduction in non-aviation emissions. By then we will have found all the easy ways to cut emissions. What will remain will be the most difficult. Between 2040 and 2050 we will have to cut emissions by 25%.
To my knowledge, there is no official strategy for how the UK will achieve the emissions cuts beyond what we achieve by 2020. My gut feeling is that getting non-aviation emissions down beyond 80% will involve some fairly serious sacrifices in living standards and I wonder what sort of sacrifices people will be willing to make in order to be able to fly thousands of miles for their holidays. In any case, my 85% figure may be conservative. It is predicated on a 6% figure as international aviation's share of UK emissions. However, the 6% figure is for departures from UK airports, not for UK residents departing and arriving. Because more UK residents than foreigners fly to and from British airports, UK residents' emissions from international aviation would be higher - the CCC estimates 7-8%.
Secondly, the target for containing emissions is for 2050. Hitting our 2050 targets is important but more important is the the quantity of greenhouse gases we emit between now and 2050. The sooner we can reduce our emissions, the better chance we stand of avoiding catastrophic climate change. It will take time to decarbonise the basics of life - keeping ourselves fed, warm and clean and travelling to work. By contrast, cutting down on flying is something we can do immediately. Most flying is discretionary in the sense that we don't need to do it in order to carry on our normal daily lives. We can take holidays in Europe rather than in Florida or Thailand and we can travel by train to most places in Europe. Flights obviously vary in importance to the flyer but I have a strong feeling that a great deal of flying could be eliminated for a very small sacrifice in human happiness. The existence of a government target for 2050 that can be met with some increase in flying does not, in my view, relieve us of the moral obligation to sieze what opportunities we can to reduce our flying and hence reduce the risk of climate catastrophe.
Thirdly, the CCC left out any factor for the increased global warming potential of greenhouse gases emitted at high altitude. Its terms of reference were to report on the feasibility of the emissions target itself, not on its global warming effect. However, the report flags up a need to take into account the full effect of aviation on global warming in future targets. This suggests that the overall message from the report would have been very different if the terms of reference had referred to the total global warming effect rather than simply the emissions. In 2005, international aviation might have accounted for between 12% and 16% of the UK's total impact on global warming.
Overall, this report doesn't change anything for me. A cursory glance at the report may suggest that it's OK for us in the UK to increase our flying by 60% but that's not how I see it. Cutting down on flying is an opportunity to reduce the risk of future catastrophe and we have a moral obligation to seize it.
NOTES FOR NERDS
For simplicity's sake, I ignored the fact that the target for UK emissions reductions is from the 1990 figure, not 2005. On the basis of Kyoto methodology, which excludes international aviation, the UK had already achieved a 16% reduction by 2005. The relevant figures are as follows:-
Total UK greenhouse gas emissions, million tonnes CO2 equivalent:
1990: 773.0
2005: 652.8
Source: http://www.decc.gov.uk/media/viewfile.ashx?filepath=statistics/climate_change/1_20091008144835_e_@@_ghgns200090326.pdf&filetype=4 downloaded 13.1.2010. Click on "Annex A" on page 1 to download the relevant statistics as a spreadsheet.
These figures are as defined for the purposes of the Kyoto Protocol and include emissions from domestic but not from international aviation. According to the Government:-
"In 2005 aviation represented 6.3 per cent. of UK emissions, calculated as a proportion of emissions in the UK inventory plus emissions from international aviation and shipping departing the UK....
"As the 'Future of Air Transport Progress Report' (December 2006) noted, aviation emissions arising from the combustion of kerosene include carbon dioxide, water vapour, nitric oxide and nitrogen dioxide, particulates and other compounds. These give rise to “radiative forcing” impacts. The total radiative impacts were estimated by the EC TRADEOFF project to be approximately twice those of carbon dioxide (excluding cirrus cloud formation).
"Using a radiative forcing multiplier of two, emissions from flights departing the UK contributed approximately 13 per cent. of total UK emissions in 2005. However, the figures for non-aviation sources do not include any radiative forcing attributable to them, as conclusive figures are not available."
Source: http://www.publications.parliament.uk/pa/cm200607/cmhansrd/cm070502/text/70502w0005.htm
According to the CCC report (Box 1.3 p39), domestic aviation accounts for about 0.3% of UK emissions - hence the figure I have used of 6%, which 6.3% for total aviation quoted in the Parliamentary answer above, less 0.3% for domestic avaiation in the CCC report.
Unfortunately I have so far been unable to find a suitable figure for aviation emissions in 1990. Without that figure it is difficult to provide more than a highly simplified analysis. It is common knowledge that UK aviation has grown substantially since 1990 and hence, once we have taken aviation into account, total reductions in ghg emissions between 1990 and 2005 will be less than the 16% I have quoted above.
Also, the Kyoto methodology ascribes emissions according to where they are produced. It is common knowledge that between 1990 and 2005, a great deal of UK manufacturing production was, in effect, "outsourced" to developing countries, particularly China. Hence if we calculated emissions on the basis of consumption by UK residents, we might see no reduction at all, and possibly an increase, between 1990 and 2005.
A similar consideration applies to international aviation. Flights originating in the UK can be considered part of UK "production". Flights by UK residents can be considered "consumption". The report suggests a figure of 7-8% (Box 1.3 p39) as a figure for emissions from flights by UK residents.
Perhaps it is now obvious why I have had to confine myself to simplified, indicative figures.
Friday, January 29, 2010
Thursday, January 28, 2010
The Impossible Hamster
I recently put a long post on the Transition Horsham Forum .
My post continued a discussion about a bit of YouTube video posted by nef (the New Economics Foundation). It's about a hamster that carries on growing at its early growth rate until it's one year old and reaches a weight of nine billion tonnes.
Here is my bit (very slightly improved):-
Andrew Simms, the author of the hamster, is a genius at explaining things graphically. For a fuller explanation of why economic growth eventually won't be possible see this very recent nef publication entitled Growth isn't possible by Andrew Simms, Victoria Johnson and Peter Chowla.
The logic seems impeccable. The big question in my mind is: for how much longer can growth continue? Technically, I think the answer is for quite a few more years, particularly in the developing world. For a while, more and more subsistence farmers will be entering the money economy and so contributing to the figures on GDP. This may not mean an increase in real wealth - if a subsistence farmer becomes a farm labourer and starts getting paid and buying his food instead of eating what he grows, he may be no more productive but he will increase GDP.
In the developed world, an increasing price of oil and other resources will tend to depress economic growth. However, for a while, we may invest heavily in renewable energy and this investment and the jobs it creates may more than offset the reduction in GDP that flows from worsening shortages of raw materials. If investment becomes a major driver of the economy at the expense of consumption, this could mean that GDP goes up while material living standards for households go down. We may see falling material living standards before we see falling GDP. This is one example of how GDP is a poor indicator of human welfare, a point forcefully made in the nef publication.
At the same time, rising oil prices will steer us away from resource-crunching consumption. We may fly off on holidays less and use the money we save to go to the theatre more. Then we'll see fewer people employed as EasyJet cabin crew and more as actors and stage hands. This change in the way we spend our money could help keep GDP up for a while.
Thirdly, technical progress may allow us for a while to get more value for less energy. The nef publication is particularly informative on this, drawing attention to the practical ways in which the Second Law of Thermodynamics sets limits to what can be achieved by technical progress.
Setting out the principles is much easier than making reliable estimates of what will happen and when. I accept that economic growth can't continue indefinitely - unless we are prepared to start paying each other handsomely for services that don't involve using much external energy - reading poetry to each other, teaching each other maths or philosophy?. However, if you were to ask me when it is likely that economic growth will come to an end because we have reached the physical limits of what earth's resources can support, I would have to say that I haven't a clue whether it's in five years, ten years, twenty years or fifty years. I don't suppose I'll ever answer that question to my own satisfaction, but I can recommend the nef publication for the very useful pointers it gives.
Lastly, the issue of whether and how long economic growth can continue is only important because lots of people think it is and public policy is structured round that view. Ask yer average politician and he (the average politician is more male than female) will say that we need growth to keep jobs and to pay for public services and pensions. In the developed world, I think we could sacrifice a huge amount of GDP without an overall sacrifice of human welfare - but it would have to be a well-managed descent. While others fret about how to keep economic growth going as long as possible, some of us are thinking about how we can manage our ultimately inevitable economic retreat - avoiding chaos, mass unemployment and a collapse in public services and trying to create an enhanced quality of life in spite of (and partly because of) falling material living standards. The Transition Movement has a big part to play in all that.
My post continued a discussion about a bit of YouTube video posted by nef (the New Economics Foundation). It's about a hamster that carries on growing at its early growth rate until it's one year old and reaches a weight of nine billion tonnes.
Here is my bit (very slightly improved):-
Andrew Simms, the author of the hamster, is a genius at explaining things graphically. For a fuller explanation of why economic growth eventually won't be possible see this very recent nef publication entitled Growth isn't possible by Andrew Simms, Victoria Johnson and Peter Chowla.
The logic seems impeccable. The big question in my mind is: for how much longer can growth continue? Technically, I think the answer is for quite a few more years, particularly in the developing world. For a while, more and more subsistence farmers will be entering the money economy and so contributing to the figures on GDP. This may not mean an increase in real wealth - if a subsistence farmer becomes a farm labourer and starts getting paid and buying his food instead of eating what he grows, he may be no more productive but he will increase GDP.
In the developed world, an increasing price of oil and other resources will tend to depress economic growth. However, for a while, we may invest heavily in renewable energy and this investment and the jobs it creates may more than offset the reduction in GDP that flows from worsening shortages of raw materials. If investment becomes a major driver of the economy at the expense of consumption, this could mean that GDP goes up while material living standards for households go down. We may see falling material living standards before we see falling GDP. This is one example of how GDP is a poor indicator of human welfare, a point forcefully made in the nef publication.
At the same time, rising oil prices will steer us away from resource-crunching consumption. We may fly off on holidays less and use the money we save to go to the theatre more. Then we'll see fewer people employed as EasyJet cabin crew and more as actors and stage hands. This change in the way we spend our money could help keep GDP up for a while.
Thirdly, technical progress may allow us for a while to get more value for less energy. The nef publication is particularly informative on this, drawing attention to the practical ways in which the Second Law of Thermodynamics sets limits to what can be achieved by technical progress.
Setting out the principles is much easier than making reliable estimates of what will happen and when. I accept that economic growth can't continue indefinitely - unless we are prepared to start paying each other handsomely for services that don't involve using much external energy - reading poetry to each other, teaching each other maths or philosophy?. However, if you were to ask me when it is likely that economic growth will come to an end because we have reached the physical limits of what earth's resources can support, I would have to say that I haven't a clue whether it's in five years, ten years, twenty years or fifty years. I don't suppose I'll ever answer that question to my own satisfaction, but I can recommend the nef publication for the very useful pointers it gives.
Lastly, the issue of whether and how long economic growth can continue is only important because lots of people think it is and public policy is structured round that view. Ask yer average politician and he (the average politician is more male than female) will say that we need growth to keep jobs and to pay for public services and pensions. In the developed world, I think we could sacrifice a huge amount of GDP without an overall sacrifice of human welfare - but it would have to be a well-managed descent. While others fret about how to keep economic growth going as long as possible, some of us are thinking about how we can manage our ultimately inevitable economic retreat - avoiding chaos, mass unemployment and a collapse in public services and trying to create an enhanced quality of life in spite of (and partly because of) falling material living standards. The Transition Movement has a big part to play in all that.
Friday, November 13, 2009
Hitting back at the deniers
Last week I had a letter published in the West Sussex County Times. It was in response to an article in support of a second runway at Gatwick Airport, written by Philip Circus, a Conservative councillor in Horsham District.
He opened his article as follows:-
"When I returned recently from an extensive overseas trip, I thought to myself how fortunate I am that I do not believe in the global warming bandwagon. No anxiety for me about 'carbon footprints'.
"Quite the contrary in fact. Far from being the kiss of death to civilisation, I rejoice in the knowledge that carbon dioxide is vital to our survival for without it life on this planet would cease."
After lauding the potential benefits of airport expansion, he says:-
"Nationally, we need to stop the persecution of airlines through higher taxes in the name of the bad science of global warming."
My response was:-
"So Philip Circus does 'not believe in the global warming bandwagon' ('Gatwick Airport expansion is key to our business prosperity', October 30th) and he refers to 'the bad science of global warming'.
"There is much scientific evidence that global warming is potentially a serious problem and that human activity is a major cause. There may well be room for honest, scientific debate about the strength of that evidence. I do not presume to take sides in that debate but Mr Circus evidently does. It would be interesting to know what his credentials are for doing so.
"This is, of course, a field where nothing is certain. What would happen if we passed certain 'tipping points' and the global mean surface temperature increased by 4 degrees celsius or more? Can we be confident that James Lovelock, FRS, is wrong in suggesting that global warming could wipe out 80% or more of the human population? Presumably Mr Circus thinks that we will not experience catastrophic climate change however much carbon dioxide we pump into the atmosphere. How should we rate the probability that he is right and how should we respond to that probability?
"For example, suppose we define climate catastrophe as change so severe and abrupt that by the end of this century it kills off a billion or more people through drought, starvation, flood, disease and resulting wars - perhaps a modest catastrophe compared with James Lovelock's 80% cull.
Suppose the mainstream science were to indicate a one-in-three chance of such a catastrophe if we allowed greenhouse gas emissions to go on rising for the next few decades.
Suppose also that we think Mr Circus has a one-in-two chance of being correct in his rubbishing of the mainstream science. That implies a one-in-six chance that we would be killing off a billion people by the end of this century. It is as if Mr Circus is inviting us to play Russian roulette with our grandchildren.
"Mr Circus's arguments for Gatwick Airport expansion fall at the first hurdle. Whatever the economic benefits of airport expansion, the risks of catastrophic climate change look substantial and imply that we should fly less, not more."
My letter was published under headline in large type that read: Playing Russian roulette with the lives of our grandchildren.
I find it relatively easy to confront non-scientists who "don't believe in" human-induced global warming. After questioning the credentials of someone taking sides in an essentially scientific debate, it is largely a matter of painting a picture of the risks we face. In any case, the voices of the deniers seem to be weakening. Mr Circus comes over as one of the last specimens of a dying breed.
Much more difficult is motivating people to make a substantial personal contribution to reducing the risks, even if they accept that there is a problem to be dealt with. So far, it has taken a recession to halt the rise in greenhouse gas emissions and that halt seems likely to be only temporary. Again, my hat goes off to Franny Armstrong and her 10:10 campaign - she and her team may do more than anyone to get us on the path to a low-carbon future.
He opened his article as follows:-
"When I returned recently from an extensive overseas trip, I thought to myself how fortunate I am that I do not believe in the global warming bandwagon. No anxiety for me about 'carbon footprints'.
"Quite the contrary in fact. Far from being the kiss of death to civilisation, I rejoice in the knowledge that carbon dioxide is vital to our survival for without it life on this planet would cease."
After lauding the potential benefits of airport expansion, he says:-
"Nationally, we need to stop the persecution of airlines through higher taxes in the name of the bad science of global warming."
My response was:-
"So Philip Circus does 'not believe in the global warming bandwagon' ('Gatwick Airport expansion is key to our business prosperity', October 30th) and he refers to 'the bad science of global warming'.
"There is much scientific evidence that global warming is potentially a serious problem and that human activity is a major cause. There may well be room for honest, scientific debate about the strength of that evidence. I do not presume to take sides in that debate but Mr Circus evidently does. It would be interesting to know what his credentials are for doing so.
"This is, of course, a field where nothing is certain. What would happen if we passed certain 'tipping points' and the global mean surface temperature increased by 4 degrees celsius or more? Can we be confident that James Lovelock, FRS, is wrong in suggesting that global warming could wipe out 80% or more of the human population? Presumably Mr Circus thinks that we will not experience catastrophic climate change however much carbon dioxide we pump into the atmosphere. How should we rate the probability that he is right and how should we respond to that probability?
"For example, suppose we define climate catastrophe as change so severe and abrupt that by the end of this century it kills off a billion or more people through drought, starvation, flood, disease and resulting wars - perhaps a modest catastrophe compared with James Lovelock's 80% cull.
Suppose the mainstream science were to indicate a one-in-three chance of such a catastrophe if we allowed greenhouse gas emissions to go on rising for the next few decades.
Suppose also that we think Mr Circus has a one-in-two chance of being correct in his rubbishing of the mainstream science. That implies a one-in-six chance that we would be killing off a billion people by the end of this century. It is as if Mr Circus is inviting us to play Russian roulette with our grandchildren.
"Mr Circus's arguments for Gatwick Airport expansion fall at the first hurdle. Whatever the economic benefits of airport expansion, the risks of catastrophic climate change look substantial and imply that we should fly less, not more."
My letter was published under headline in large type that read: Playing Russian roulette with the lives of our grandchildren.
I find it relatively easy to confront non-scientists who "don't believe in" human-induced global warming. After questioning the credentials of someone taking sides in an essentially scientific debate, it is largely a matter of painting a picture of the risks we face. In any case, the voices of the deniers seem to be weakening. Mr Circus comes over as one of the last specimens of a dying breed.
Much more difficult is motivating people to make a substantial personal contribution to reducing the risks, even if they accept that there is a problem to be dealt with. So far, it has taken a recession to halt the rise in greenhouse gas emissions and that halt seems likely to be only temporary. Again, my hat goes off to Franny Armstrong and her 10:10 campaign - she and her team may do more than anyone to get us on the path to a low-carbon future.
Tuesday, October 13, 2009
Mending my wellies
One of the drawbacks of taking global warming seriously is that you can come across as something of a nutter. This isn't a great problem for me because I already have other claims to nuttiness, like having a GCSE in Esperanto. However, this post is about my obsession with making-do and mending.
Recently I repaired a couple of pairs of wellington boots. Wellies, I find, have a habit of splitting when my partner wears them. She got me some new ones for my birthday a year or so ago but took to borrowing them with the inevitable result - a split that let the water in. I now had two pairs of leaky wellies, one of which I had tried to mend before.
The secret, I find, is to stick a cloth patch over the split and put adhesive over the top of the patch to seal it in. Bostik all-purpose adhesive seems to do the job OK but I found a better product called Stormsure. Combined with the cloth patch the Stormsure did a superb job on one of the split wellies, but I wasted the rest of it trying to mend the split on the other without a patch. Having run out of Stormsure (it comes in small tubes) I have redone the job with a cloth patch and some rather old Bostik and it seems to have worked. If that repair doesn't last I'll get some more Stormsure.
The question is: what energy have I saved by mending my wellies rather than buying a new pair? For guidance on this, I have turned to my usual source: David MacKay's Sustainable energy - without the hot air. According to this (p 325), the embodied energy in plastics (wellies aren't made of rubber these days) is generally about 25 kilowatt-hours (kWh) per kilogram. Each welly weighs about one kilogram, so if I have stopped myself buying two pairs of replacement wellies, that would seem to represent an energy saving of about 100 kWh. OK, I have ignored the rest of the energy involved in manufacturing, transporting and retailing wellies, but I have also left out the embodied energy in the adhesive.
100 kWh is the energy I would on average use as gas and electricity in my flat over a period of about 14 days (see my post of August 31st). It's also equivalent to driving about 52 miles in a car that does 33 miles per gallon (83km at 12 km/litre or 8.3 litres per 100 km, see MacKay p29). Not a spectacular saving, but, as David MacKay says, every little helps a little.
What I missed out of the calculation may be important. By not buying new wellies I have declined to support the manufacturers, transporters and retailers of wellies. As a result, these people will have less to spend on things like new wellies and there will be energy and emissions savings as a result. My money has stayed in my modest, private hoard and has failed to help the economy out of recession. That gives me some satisfaction. I have to be cruel to be kind. To save our civilisation from a future catastrophe from global warming, I think we in the developed world need to give up our hopes of economic growth and get used to a steady-state or even a receding economy. My make-do-and-mend obsession is part of my contribution to that much-needed recession.
Recently I repaired a couple of pairs of wellington boots. Wellies, I find, have a habit of splitting when my partner wears them. She got me some new ones for my birthday a year or so ago but took to borrowing them with the inevitable result - a split that let the water in. I now had two pairs of leaky wellies, one of which I had tried to mend before.
The secret, I find, is to stick a cloth patch over the split and put adhesive over the top of the patch to seal it in. Bostik all-purpose adhesive seems to do the job OK but I found a better product called Stormsure. Combined with the cloth patch the Stormsure did a superb job on one of the split wellies, but I wasted the rest of it trying to mend the split on the other without a patch. Having run out of Stormsure (it comes in small tubes) I have redone the job with a cloth patch and some rather old Bostik and it seems to have worked. If that repair doesn't last I'll get some more Stormsure.
The question is: what energy have I saved by mending my wellies rather than buying a new pair? For guidance on this, I have turned to my usual source: David MacKay's Sustainable energy - without the hot air. According to this (p 325), the embodied energy in plastics (wellies aren't made of rubber these days) is generally about 25 kilowatt-hours (kWh) per kilogram. Each welly weighs about one kilogram, so if I have stopped myself buying two pairs of replacement wellies, that would seem to represent an energy saving of about 100 kWh. OK, I have ignored the rest of the energy involved in manufacturing, transporting and retailing wellies, but I have also left out the embodied energy in the adhesive.
100 kWh is the energy I would on average use as gas and electricity in my flat over a period of about 14 days (see my post of August 31st). It's also equivalent to driving about 52 miles in a car that does 33 miles per gallon (83km at 12 km/litre or 8.3 litres per 100 km, see MacKay p29). Not a spectacular saving, but, as David MacKay says, every little helps a little.
What I missed out of the calculation may be important. By not buying new wellies I have declined to support the manufacturers, transporters and retailers of wellies. As a result, these people will have less to spend on things like new wellies and there will be energy and emissions savings as a result. My money has stayed in my modest, private hoard and has failed to help the economy out of recession. That gives me some satisfaction. I have to be cruel to be kind. To save our civilisation from a future catastrophe from global warming, I think we in the developed world need to give up our hopes of economic growth and get used to a steady-state or even a receding economy. My make-do-and-mend obsession is part of my contribution to that much-needed recession.
Wednesday, September 9, 2009
"Last chance to change our behaviour"
I found an interesting article yesterday by David Hillyard of Earthwatch Institute which can be seen here, along with a comment from me (among many). Much of his article was about our failure so far to shift from the path of environmental destruction and how the pursuit of economic growth seems to trump sustainability. I supported him on this and in fact both our posts were mainly cries from the heart for us to mend our ways.
His closing comment is "In a world driven by a market economy, business has vital role to play in moving to this new future and can step up and play a leadership role in creating a sustainable future."
My own final sentences were rather non-committal:- "Our economic infrastructure - our companies, capital markets, company law, taxation etc - were designed for an age when the case for economic growth was much stronger. It will be very interesting to see whether leadership towards true sustainability emerges from within the economic infrastructure itself, as David Hillyard suggests it might."
Here is my post in full (edited very slightly):-
"My own reading of the science and economics of climate change, and of other environmental issues, strongly suggests that material living standards in the developed world must fall if the environmental threats are to be effectively confronted. I think we have strong grounds to hope that we can nevertheless enhance our health and happiness.
"The recession we may soon emerge from was unplanned. What we now need is a planned long-term recession that reconciles enhanced health and happiness with falling material living standards. We will obviously need to confront difficult questions such how to pay for health care, honour pension commitments and give people opportunities for purposeful activity in the context of a possibly shrinking formal economy.
"The Government and most of the political class clearly don't see it this way. Political leadership towards a truly sustainable economy is conspicuously lacking. In the media, contributions such as this by David Hillyard still seem to belong in the fringe of public discourse. The desirability of economic growth is treated as a truth universally recognised.
"Our economic infrastructure - our companies, capital markets, company law, taxation etc - were designed for an age when the case for economic growth was much stronger. It will be very interesting to see whether leadership towards true sustainability emerges from within the economic infrastructure itself, as David Hillyard suggests it might."
His closing comment is "In a world driven by a market economy, business has vital role to play in moving to this new future and can step up and play a leadership role in creating a sustainable future."
My own final sentences were rather non-committal:- "Our economic infrastructure - our companies, capital markets, company law, taxation etc - were designed for an age when the case for economic growth was much stronger. It will be very interesting to see whether leadership towards true sustainability emerges from within the economic infrastructure itself, as David Hillyard suggests it might."
Here is my post in full (edited very slightly):-
"My own reading of the science and economics of climate change, and of other environmental issues, strongly suggests that material living standards in the developed world must fall if the environmental threats are to be effectively confronted. I think we have strong grounds to hope that we can nevertheless enhance our health and happiness.
"The recession we may soon emerge from was unplanned. What we now need is a planned long-term recession that reconciles enhanced health and happiness with falling material living standards. We will obviously need to confront difficult questions such how to pay for health care, honour pension commitments and give people opportunities for purposeful activity in the context of a possibly shrinking formal economy.
"The Government and most of the political class clearly don't see it this way. Political leadership towards a truly sustainable economy is conspicuously lacking. In the media, contributions such as this by David Hillyard still seem to belong in the fringe of public discourse. The desirability of economic growth is treated as a truth universally recognised.
"Our economic infrastructure - our companies, capital markets, company law, taxation etc - were designed for an age when the case for economic growth was much stronger. It will be very interesting to see whether leadership towards true sustainability emerges from within the economic infrastructure itself, as David Hillyard suggests it might."
Monday, September 7, 2009
The 10:10 pledge
Last Tuesday (1st September) I went to Tate Modern and signed up to the 10:10 pledge - ie to reduce my greenhouse gas emissions by 10% in 2010, and collected a little pendant recycled from an old Boeing 747 to prove it.
The 10:10 campaign is organised by Franny Armstrong, of Age of Stupid fame. I think it's a brilliant idea as it brings home the need to make substantial cuts in emissions in the near future and not be lulled into thinking we can go at a leisurely pace towards an 80% reduction by 2050.
Signing up was a rash move for me. My domestic energy consumption is already down to 31% of the national average for 2008 (see my last post) and I don't really have much of a clue about how I can get it down to 28%. For a start, I'll be more precise in the way I fill my electric kettle and I'll try and keep better track of the minutes I spend under a hot shower every morning.
Outside the home I'm always looking at ways I waste energy, such as by pressing the button at a pedestrian crossing. I reckon stopping a car weighing 1 tonne and travelling at 30 mph (about 48 kph) wastes about 25 watt-hours of usable energy (and a lot more unusable energy because of the inefficiency of a petrol or diesel engine), enough to keep an 18W energy-saving lightbulb (100W incandescent equivalent) alight for about an hour and twenty minutes. It's also enough to bring water to the boil to make one cup of tea (a quarter of a litre).
If I stop a 40-tonne articulated lorry (or 40 1-tonne cars), then the usable energy wasted is about 1 kilowatt-hour - nearly one seventh of my daily domestic energy consumption.
The trouble is, I've been alive to all this for a number of years and I already try not to stop traffic at pedestrian crossings so I don't think extra care here will get me far towards my 10% target.
Incidentally, I thought The Guardian did the campaign proud - http://www.guardian.co.uk/environment/10-10
The 10:10 campaign is organised by Franny Armstrong, of Age of Stupid fame. I think it's a brilliant idea as it brings home the need to make substantial cuts in emissions in the near future and not be lulled into thinking we can go at a leisurely pace towards an 80% reduction by 2050.
Signing up was a rash move for me. My domestic energy consumption is already down to 31% of the national average for 2008 (see my last post) and I don't really have much of a clue about how I can get it down to 28%. For a start, I'll be more precise in the way I fill my electric kettle and I'll try and keep better track of the minutes I spend under a hot shower every morning.
Outside the home I'm always looking at ways I waste energy, such as by pressing the button at a pedestrian crossing. I reckon stopping a car weighing 1 tonne and travelling at 30 mph (about 48 kph) wastes about 25 watt-hours of usable energy (and a lot more unusable energy because of the inefficiency of a petrol or diesel engine), enough to keep an 18W energy-saving lightbulb (100W incandescent equivalent) alight for about an hour and twenty minutes. It's also enough to bring water to the boil to make one cup of tea (a quarter of a litre).
If I stop a 40-tonne articulated lorry (or 40 1-tonne cars), then the usable energy wasted is about 1 kilowatt-hour - nearly one seventh of my daily domestic energy consumption.
The trouble is, I've been alive to all this for a number of years and I already try not to stop traffic at pedestrian crossings so I don't think extra care here will get me far towards my 10% target.
Incidentally, I thought The Guardian did the campaign proud - http://www.guardian.co.uk/environment/10-10
Monday, August 31, 2009
MY DOMESTIC ENERGY CONSUMPTION 31% OF NATIONAL AVERAGE
Last week I did an analysis of my energy bills for the last year. The results in terms of average power consumption over the past year are:-
Gas: 205 watts, 4.9 kilowatt-hours per day
Electricity: 99 watts, 2.4 kilowatt-hours per day
Total: 305 watts, 7.3 kilowatt-hours per day
These figures are adjusted to take into account the time I am away from the flat, when no gas is used and very little electricity.
According to my calculations, the UK average for total domestic energy consumption per person in 2008 was 992 watts or 23.8 kWh per day. That makes my consumption about 31% of the national average per person when I am in my London flat.
It is tempting to think that if my figures became the national average and similar savings were made in the non-domestic sectors (eg transport, industry and commerce), then the UK could achieve a 69% reduction in its carbon emissions without any switch to renewables. However, there are some special factors.
Firstly, my flat is only about 2 km from the centre of London. With the urban heat-island effect, this means that I must be living in one of the warmest parts of the UK.
Secondly, last winter I was probably "free-riding" on my neighbours' heating. I used my central heating very sparingly - not at all for many weeks - and aimed only to keep the temperature in my living room at or above 15C, often resorting to a body warmer over my sweater. I have three exterior walls and I am largely isolated by a staircase from the next-door flat but I have a flat above and below me. If the occupants of these two flats kept their living-room temperatures at a more normal 20C, say, then they will have been paying their heating bills partly to keep me warm. Serves them right for not being eco, but if they adopted my practice of living at 15C, I would probably need to use more gas to keep up to that temperature. All in all, 69% probably overstates the amount by which domestic energy consumption could be reduced if people adopted my lifestyle - but by how much I don't know.
A few boring details - for enthusiasts only
The exterior walls of the flat are 11 inch cavity walls, both leaves of which are dense brick, with internal plastering. The cavity is filled with rockwool. Additional wall insulation would cost me a lot of floorspace. The windows are double glazed, the frames being UPVC over aluminium, and in my living room, where I spend most of my indoor waking hours, there is secondary glazing in addition, giving me triple glazing in effect. Practically all my light bulbs are compact fluorescent. My boiler is nine years old and not a condensing boiler, so further economies are possible there. I have a fridge but not freezer and use my television and hi-fi very little. The main calls on my electricity are fridge, lighting, computer and an electric kettle.
My calculation of the national average domestic energy consumption is as follows:-
Total domestic energy consumption in 2008: 45,985 thousands of tonnes of oil equivalent (Source: Office for National Statistics, Monthly Digest of Statistics, July 2009, Table 8.2)
Multiply by 11,630 x 1,000 to convert to kilowatt-hours (kWh) - the conversion factor of 11,360 is given in Department for Business, Enterprise and Regulatory Reform, Digest of United Kingdom Energy Statistics 2008, p17
Divide by 366 (2008 was a leap-year) to give consumption per day
Divide by 61,383,000 - 2008 mid-year estimate for UK population (Source: http://www.statistics.gov.uk/CCI/nugget.asp?ID=6, accessed 31 August 2009)
Daily energy consumption = 45,985 x 11,630 x 1,000 / 366 / 61,383,000 = 23.8 kWh / day
Multiply by 1000/24 to give power consumption in watts = 23.8 x 1000 / 24 = 992 watts
Gas: 205 watts, 4.9 kilowatt-hours per day
Electricity: 99 watts, 2.4 kilowatt-hours per day
Total: 305 watts, 7.3 kilowatt-hours per day
These figures are adjusted to take into account the time I am away from the flat, when no gas is used and very little electricity.
According to my calculations, the UK average for total domestic energy consumption per person in 2008 was 992 watts or 23.8 kWh per day. That makes my consumption about 31% of the national average per person when I am in my London flat.
It is tempting to think that if my figures became the national average and similar savings were made in the non-domestic sectors (eg transport, industry and commerce), then the UK could achieve a 69% reduction in its carbon emissions without any switch to renewables. However, there are some special factors.
Firstly, my flat is only about 2 km from the centre of London. With the urban heat-island effect, this means that I must be living in one of the warmest parts of the UK.
Secondly, last winter I was probably "free-riding" on my neighbours' heating. I used my central heating very sparingly - not at all for many weeks - and aimed only to keep the temperature in my living room at or above 15C, often resorting to a body warmer over my sweater. I have three exterior walls and I am largely isolated by a staircase from the next-door flat but I have a flat above and below me. If the occupants of these two flats kept their living-room temperatures at a more normal 20C, say, then they will have been paying their heating bills partly to keep me warm. Serves them right for not being eco, but if they adopted my practice of living at 15C, I would probably need to use more gas to keep up to that temperature. All in all, 69% probably overstates the amount by which domestic energy consumption could be reduced if people adopted my lifestyle - but by how much I don't know.
A few boring details - for enthusiasts only
The exterior walls of the flat are 11 inch cavity walls, both leaves of which are dense brick, with internal plastering. The cavity is filled with rockwool. Additional wall insulation would cost me a lot of floorspace. The windows are double glazed, the frames being UPVC over aluminium, and in my living room, where I spend most of my indoor waking hours, there is secondary glazing in addition, giving me triple glazing in effect. Practically all my light bulbs are compact fluorescent. My boiler is nine years old and not a condensing boiler, so further economies are possible there. I have a fridge but not freezer and use my television and hi-fi very little. The main calls on my electricity are fridge, lighting, computer and an electric kettle.
My calculation of the national average domestic energy consumption is as follows:-
Total domestic energy consumption in 2008: 45,985 thousands of tonnes of oil equivalent (Source: Office for National Statistics, Monthly Digest of Statistics, July 2009, Table 8.2)
Multiply by 11,630 x 1,000 to convert to kilowatt-hours (kWh) - the conversion factor of 11,360 is given in Department for Business, Enterprise and Regulatory Reform, Digest of United Kingdom Energy Statistics 2008, p17
Divide by 366 (2008 was a leap-year) to give consumption per day
Divide by 61,383,000 - 2008 mid-year estimate for UK population (Source: http://www.statistics.gov.uk/CCI/nugget.asp?ID=6, accessed 31 August 2009)
Daily energy consumption = 45,985 x 11,630 x 1,000 / 366 / 61,383,000 = 23.8 kWh / day
Multiply by 1000/24 to give power consumption in watts = 23.8 x 1000 / 24 = 992 watts
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