In 2007, David Fridley of Lawrence Berkeley Labs and San Francisco Oil Awareness presented a well researched and thorough debunking of the idea that biofuels are sustainable, environmentally friendly, good for farmers, or a path to energy independence. Fridley and his audience approach the issue from an industrial-human-centric standpoint concerned about peak oil, rather than from a holistic earth-centric and anti-civilization perspective, but his presentation is excellent for what it is. This is a great way to get up to speed on the dramatic, across the board problems and limitations of biofuels.