AlterNet: As a lifelong scientist I have attended climate change meetings for over 30 years. Our aim was to convince scientists and policymakers to take climate change seriously. The message was: 'Take action now, to leave a better world for your grandchildren.' In the past, many of my colleagues working in development were not convinced - poor and hungry people cannot afford to worry about climate change. Such was the conventional wisdom. The conference on "Hunger-Nutrition-Climate Justice' that I attended...