Members of civil society do not have a seat at the upcoming climate treaty negotiations in Copenhagen, yet the issue of climate change affects us all. Looking at the causes and potential cures for global warming, Robert Musil sees hope in the role of the individual. He argues that it is efforts of a growing grassroots movement of engaged citizens that will ultimately decide the course of the climate challenge. Through personal choices and political engagement, he explores how we can cut carbon emissions and produce unprecedented change across sectors. Musil was the Executive Director and CEO of Nobel Peace Prize–winning organization Physicians for Social Responsibility (PSR) and helped launch PSR’s environmental program in the early 1990s.