Some environmentalists are warning that the rush to develop commercially viable biofuels may actually speed up global warming as vast swaths of rainforest are cleared to make way for feedstocks. "When trees are cut down to make room for new farmland, they are usually burned, sending their stored carbon to the atmosphere as carbon dioxide," says Holly Gibbs of Stanford's Woods Institute for the Environment. Though biofuels are an important part of energy policy, Gibbs says feedstocks must be grown on marginal lands rather than U.S. farmland or tropical rainforests.

Full Story:

Related Summaries