Controversial environmentalist, author and presidential adviser Mark Lynas talks about his change of heart over nuclear power and genetically modified crops, and explains why some of the biggest challenges to environmentalism come from the political left.
Nnimmo Bassey, head of Friends of the Earth International dismisses the biotech industry's claims that GM crops require fewer pesticides and produce higher yields
Mother Jones: As presidential candidate, Barack Obama promised he would force the labelling of GM ingredients in food. But he's since gone silent on the subject, despite public support for the measure