A world with 7 billion people, each of whom seeks to live the American Dream, will translate into increasingly serious environmental sustainability issues—among them greenhouse gas emissions that will cause hotter temperatures, rising sea levels, and natural disasters. In this university podcast, UCLA professor Matt Kahn talks about the scope of the problem. Kahn was talking at the 2010 Climate Policy Instruments in the Real World conference, an event convened by the Program on Energy and Sustainable Development (PESD) at Stanford University.