Crunch carrots, cut climate change

We really need to be redoubling our efforts to tackle climate change. Just look at the blog entry before this one, where Stern says the problem is far worse than he'd previously described in his highly influential report - and the entry before that on government giving the cold shoulder to action on climate. Many think of efforts to tackle climate change in terms of flying less, driving less, using renewable, low carbon energy sources, insulating our homes, recycling materials...but adjusting our diet is not so commonly mentioned.

Changing to a lower meat, higher fruit and veg diet can in fact be one of the most effective ways of lowering carbon emissions and tackling climate change, especially if beef consumption is reduced or eliminated. Consider the estimated total eco footprint of meat compared with fruit and vegetables: 6.9 to 14.6 hectare yrs per tonne for meat (calculated using average global yield and embodied energy data - the range is due to pasture-fed vs grain-fed animals); as against 0.3 to 0.6 hectare yrs per tonne for a range of fruits, roots and vegetables (calculated using average global yield for a range of veg, with an allowance for transport, processing and energy for farming).

These estimates from the book Sharing Nature's Interest by footprint experts Chambers, Simmons and Wackernagel (2000) show the the environmental impact of meat is 11 to 49 times higher than fruit and vegetables. This chimes with the basic science because the food chain for meat is obviously longer, with many vegetables and grains being grown for use as animal feed. [Meat impacts are 1.5 to 8.5 times higher than grains and pulses too.]  Beef farming has a very high climate impact due to: rainforest clearance to create the farmland, perhaps by burning; grain feeding the animals; methane released by the cows metabolism, (and dont forget the long distance trade in frozen meat).

In short: crunch carrots more, eat meat less and you will contribute to cutting climate change! Whether the fruit and veg are chemically grown abroad, or locally and organically grown, they're going to have lower climate impact than any kind of meat. There are other benefits too as lower meat diets are cheaper and healthier. Carrots for instance - given that it was National Carrot Day on 3 Feb and that it will be International Carrot Day on 4 April  - have the highest vitamin A content of all veg and are loaded with vitamin B6, vitamin C and potassium too. Find out more from this amazing, if somewhat bizarre site: http://www.carrotmuseum.co.uk/    

Climate cold shoulder

Here's an interesting Radio 4 program on what lies beneath widespread denial of climate change. Laurie Taylor talks to Sally Weintrobe, the editor of the first book of its kind which explores, from a multi disciplinary perspective, what the ecological crisis actually means to people. In spite of a scientific consensus, many continue to resist or ignore the message of climate communicators - but why? What are the social and emotional explanations for this reaction?
 
What is this climate problem anyway? The key stores in the global carbon cycle are shown in the image I've drawn (below, click to enlarge). The arrows representing the flow of carbon between key stores are annotated with the mechanism of transfer.

 

Key aspects to note: Chalk and limestone and fossil fuels are very large carbon stores formed over very long periods but when used they very quickly release carbon to the atmosphere. Burning forests and changing land use by logging and then farming beef or soya both very quickly releases carbon into the air and cuts the rate of carbon removal. Ocean capacity to absorb and store carbon is decreasing as it’s warming up, and oceans are acidifying. The result of this and more: carbon concentration in the atmosphere is rising. 
 
People, especially those living in the most economically developed societies, currently impact heavily on the carbon cycle. Total carbon dioxide equivalent emissions per person per year in the UK are now more than 10 tonnes, when a sustainable level is 2 tonnes. Elsewhere in the economically developed world it can be higher than this eg in the USA.
 
 In constructing homes, factories, roads...people consume huge quantities of fossil fuel and cement (see image). Extracting/producing, transporting and using fossil fuels and cement in itself releases large amounts of carbon.
 
In heating and lighting homes and using many gadgets people consume large amounts of natural gas and electricity (largely produced by burning fossil fuels in power stations).
 
In transporting themselves around by car and their factory mass produced and consumed goods around the globe by heavy lorry, planes and ships, huge amounts of petrol, diesel and aviation fuel are burned, emitting carbon.
 
Demand for land is high and growing eg to feed a growing world population and to meet high demand for meat. Beef farming in particular is land and energy intensive - large scale deforestation (see image) has occurred to make land available for it.
 
One reaction to all this: the UK Climate Change Act, 2008 under the last Labour Govt, which sets a carbon reduction target of at least 80% by 2050 from 1990 levels, and carbon budgeting. However, the Coalition Govt has, amongst a long list of green failures: dropped the pledge to cut EU emissions by 30% by 2020 and is instead getting the EU "back on track" to cutting energy consumption by 20% by 2020; abandoned a planned rise in the renewable energy target; axed a commitment to replace air passenger duty with a per-flight tax; severely limited the scope of green financial products supposed to enable people to invest in green infrastructure; favoured greater reliance on finite and climate change causing natural gas; favoured fracking for shale gas....see here for more. 

Find out more on climate change from: http://www.metoffice.gov.uk/climate-change

http://news.bbc.co.uk/1/shared/spl/hi/sci_nat/04/climate_change/html/climate.stm

http://www.bbc.co.uk/sn/hottopics/climatechange/

Mayoral momentum

George Ferguson was "bowled over" by the response to his mayoral campaign when he held a jamboree in the city (story here). Interesting that George has generated these numbers (500 in the report) and this reported, at least, enthusiam. He's gained some momentum in his campaign and some advantage through declaring his candidacy early on and being the first to send out a leaflet. Despite his Liberal background and pretty obvious broadly liberal approach to politics he is benefitting and will benefit from not being a candidate representing a political party. He also has a decent national standing and can point to a list of achievements that will impress some voters. My question to George however is - where's the beef?...please openly state your principles and convictions in a good deal more detail than you already have. He appears to be pursuing a strategy of trying to win the Mayoral election mostly on the basis of finding out what people want and then saying that this is his policy rather than getting elected because he is openly stating policy convictions. For me he is clearly the main opposition to Labour's candidate Marvin Rees though.