"So, incredibly, when the hidden costs of conversion are included, greenhouse-gas emissions from corn ethanol over the next 30 years will be twice as high as from regular gasoline. In the long term, it will take 167 years before the reduction in carbon emissions from using ethanol 'pays back' the carbon released by land-use change. As they say, it's not easy being green.What is the typical citizen supposed to think, eh?
The second study comes out of the University of Minnesota and the Nature Conservancy and explores what the authors call the 'carbon debt' when native ecosystems are converted to biofuel stock. Until the debt is repaid, biofuels from those fields will be greater net emitters than the fossil fuels they replace. The authors find that the debt for corn ethanol in the U.S. is between 48 and 93 years. In Indonesia and Malaysia, which have a 1.5% annual rate of deforestation to produce palm oil for Western European biodiesel, the debt is as high as 423 years. Yep, that's four centuries. Even Fidel Castro won't last that long."
Thursday, February 14, 2008