Nearly three of every four – 74% – are more convinced today that global warming is a reality than they were two years ago, the survey shows. Dramatically, it is a sentiment shared by a majority of Democrats, Republicans, and political independents. While many more Democrats believe in global warming (87%), 56% of Republicans concur. Among independents, 82% think we are experiencing the effects of global warming. These numbers indicate a shift in the momentum of global warming believers.