The early effects of global warming are already evident across the United States and worldwide. The past nine years have all been among the 25 warmest for the contiguous United States, a streak unprecedented in the historical record. If emissions are left unchecked, temperatures will continue to rise, and the effects of global warming will become more severe. This report examines trends in U.S. global warming pollution nationally and by state and concludes that the failure to limit emissions nationwide has allowed global warming pollution to grow out of control.
