Green Earth Journey
JULY 8, 2009
Any biofuel that causes clearing of natural ecosystems is likely to increase global warming," Fargione says. But not all biofuels are alike. As long as there is land conversion, though, biofuels do not diminish carbon dioxide emissions. Biofuels made from sources that do not require land conversion, such as corn stover (the parts of corn plants left over after the ears are harvested), animal waste, damaged trees, algae, and food waste are promising alternatives.