The scrubby jatropha tree has been touted as a wonder biofuel with unlimited potential. But questions are now emerging as to whether widespread jatropha cultivation is really feasible or whether it will simply displace badly-needed food crops in the developing world.

Kelly Brownell has long studied the relationship between rising levels of obesity in the U.S. and the way our food is grown, processed, packaged, and sold. In an interview with Yale Environment 360, he discusses the common marketing and lobbying tactics employed by the food and tobacco industries.

In an interview with Yale Environment 360, best-selling author Michael
Pollan talks about biofuels and the food crisis, the glories of
grass-fed beef, and why environmentalists must look beyond wilderness
to sustainability.