Date published: 2006/09/22
Jeff McNeely (IUCN), on the BBC says:
With soaring oil prices, and debates raging on how to reduce carbon emissions to slow climate change, many are looking to biofuels as a renewable and clean source of energy.
The European Union recently has issued a directive calling for biofuels to meet 5.75% of transportation fuel needs by 2010. Germany and France have announced they intend to meet the target well before the deadline; California intends going still further.
This is a classic "good news-bad news" story.
Of course we all want greater energy security, and helping achieve the goals (however weak) of the Kyoto Protocol is surely a good thing.
However, biofuels - made by producing ethanol, an alcohol fuel made from maize, sugar cane, or other plant matter - may be a penny wise but pound foolish way of doing so.
Consider the following:
- The grain required to fill the petrol tank of a Range Rover with ethanol is sufficient to feed one person per year. Assuming the petrol tank is refilled every two weeks, the amount of grain required would feed a hungry African village for a year
- Much of the fuel that Europeans use will be imported from Brazil, where the Amazon is being burned to plant more sugar and soybeans, and Southeast Asia, where oil palm plantations are destroying the rainforest habitat of orangutans and many other species. Species are dying for our driving
- If ethanol is imported from the US, it will likely come from maize, which uses fossil fuels at every stage in the production process, from cultivation using fertilisers and tractors to processing and transportation. Growing maize appears to use 30% more energy than the finished fuel produces, and leaves eroded soils and polluted waters behind
- Meeting the 5.75% target would require, according to one authoritative study, a quarter of the EU's arable land
- Using ethanol rather than petrol reduces total emissions of carbon dioxide by only about 13% because of the pollution caused by the production process, and because ethanol gets only about 70% of the mileage of petrol
- Food prices are already increasing. With just 10% of the world's sugar harvest being converted to ethanol, the price of sugar has doubled; the price of palm oil has increased 15% over the past year, with a further 25% gain expected next year.
Little wonder that many are calling biofuels "deforestation diesel", the opposite of the environmentally friendly fuel that all are seeking.
With so much farmland already taking the form of monoculture, with all that implies for wildlife, do we really want to create more diversity-stripped desert?
Others are worried about the impacts of biofuels on food prices, which will affect especially the poor who already spend a large proportion of their income on food.
There is no such thing as a free lunch. All energy sources (even solar and wind) have concomittant problems. But although biofuels have plenty of problems (as stated), they are probably going to be part of the "solution" to the energy supply in the medium term, along with a whole mix of other sources.
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