Motley Fool: John Vechey of PopCap Games recently joined The Motley Fool for a climate change summit. His first panel guests were Dr. Rachel Cleetus and Dr. Joe Casola. Rachel is a climate economist with the Union of Concerned Scientists, where she advocates for effective global warming policies at the state, regional, federal, and international levels. Joe is the program director for science and impacts at the Center for Climate and Energy Solutions, which works to assess the current state of knowledge regarding...