By now, there can no longer be any serious doubt that climate change is real. About 97 percent of the climate science community agrees. There are uncertainties about details, of course, but overall the science is solid and indisputable. The change is anthropogenic. We, the people of Planet Earth, are responsible.
In May, the U.S. National Climate Assessment study essentially confirmed a recent global report by the Intergovernmental Panel on Climate Change. Land and sea surface temperatures and sea levels have risen in tandem. Arctic sea ice and glacier mass are declining. The West Antarctic ice shelf is falling apart.