More on Biofuels

We can't just write off biofuels, but we can't accept them blindly either. My view is that there are only three solutions to the coming energy crisis: reduce, reduce and reduce. (Yes I know it's an old one) Once we have minimised our fuel use, where do we get the remainder from?

In some circumstances biofuels are economically viable, but in some cases they are not. US farmers are heavily subsidised to grow crops for bio-ethanol, but it is very doubtful that the energy in the bio-fuel exceeds the energy needed to plough the fields, fertilise the crop, irrigate it, spray it against diseases and pests (and produce and deliver the fertilisers and insecticides to the farm), harvest it, process it and deliver it to the refinery and then refine it. It's good business for US farmers, but it's pushed up the world price of wheat which is affecting UK pig farmers and third-world countries trying to buy food.

Have you seen this month's Ecologist magazine? An article talks about how Colombia is becoming a major producer of African oil palm, a biofuel plant. This development is supported by the US and the EU, and on the face of it, it's attractive. It provides a source of green fuel (plant growth is more effective in warmer Colombia) and it can displace some of the drug barons' coca crops. The drug barons see an opportunity too. They are taking over the land, if necessary driving out the local farmers at gunpoint, and planting the oil palms. The government plans to cover an area twice the size of Belgium with the trees. If necessary they cut down the rain forest. Mono culture is rarely viable, and before long the land is exhausted and turned to scrubland. The rain forest has been destroyed, the ecosystems have been destroyed, the livelihood of the local people has been destroyed and the possibility of growing more biofuel crops on that land has been destroyed - and for what? To allow Westerners to continue to drive highly inefficient vehicles!

Our fatal assumption is that we will be able to continue with our present lifestyle and continue to enjoy the same access to energy, but just get it from different sources. There is a serious risk that if we don't wake up to reality, and if chase solutions without thinking through their consequences, we will destroy the planet faster than ever before!

2020 vision at the EU

This week European Union leaders have been debating carbon dioxide (CO2) emissions and they have a firm commitment to achieve at least a 20% reduction of greenhouse gas emissions by 2020 compared to 1990. Furthermore, they will increase energy efficiency in the EU so as to achieve the objective of saving 20% of the EU's energy consumption compared to projections for 2020,

Central to this is a binding target of a 20% share of renewable energies in overall EU energy consumption by 2020 and a 10% binding minimum target to be achieved by all Member States for the share of biofuels in overall EU transport petrol and diesel consumption by 2020.

Leaving aside the controversy generated by Channel 4’s film – whether CO2 reduction is possible or worth while – there must still be doubts about whether any of this is achievable. Elsewhere in this blog I have commented on how biofuels are much less green than people would like to think. Biofuel crops absorb CO2, but growing, harvesting and processing them takes up so much energy that the net gain is small or in some cases negative. Growing the crops puts pressure on food crops or rain forests, and to some extent we will burn green fuels while exporting the disadvantages of the fuels to third world countries where the crops are grown.

Biomass is part of the way towards reaching the EU’s 20% target. Today Drax Power, which runs the UK’s largest power station, announced plans to grow biomass on an area equivalent to one fifth of the land of Wales. This will produce sufficient fuel to provide 10% of the requirements of Drax. The station produces 8% of the UK’s electricity, so biomass will account for just 0.8%. If we took over the whole of Wales to grow biofuel crops we would still only achieve 4% of the UK’s electricity – and where would we put the Welsh? -

Bush goes bio

Newspaper reports claim that there are signs at last that the White House is taking the environment seriously. This week President Bush was in Brazil to discuss the new ethanol economy - road fuel manufactured from plants. To me this seems more of a realisation that fossil oil is running out, rather than a desire to use "green" fuels. There are serious doubts in any case over whether biofuels are truly green. While the plants used for biofuels do absorb carbon dioxide as they grow, they do not absorb all the co2 released by the whole growth/harvest/processingrefining/use cycle. Some say that the energy input is greater than the energy content of the biofuel produced. Land used for fuel crops displaces food crops, or in some cases displaces rainforest. Cutting down the rainforest releases carbon dioxide and so removes part of the largest co2 absorber in the world. Growing fuel crops instead of food means poorer nations may go hungry.

The signs are that fossil fuel shortages -Peak Oil- are just around the corner. There will never be enough biofuel to replace all the oil we now use. It's a good plan to plan to use less. At least you'll save money and it won't hurt as much when shortages really bite!