Tweet Michael Oppenheimer summed it up, "We are all sitting ducks" The WGII Summary for Policy Makers is available. It can be downloaded , and is not very long (44 pages including figures, about 30 pages of print). If bunnies have been paying attention a fast skim can be done. It is a sobering read, no more so than expected, perhaps less than needed. The first sentence says it all Human interference with the climate system is occurring, and climate change poses risks for human and natural systems Human existence depends on those natural systems and humans are straining them to the breaking point and it is in the natural systems that the largest effects have been seen, seen, but mere harbingers of that to come. In recent decades, changes in climate have caused impacts on natural and human systems on all continents and across the oceans.