These dire warnings have no basis in science or actual evidence, and should be recanted. Simply put, climate model exercises and what-if simulations are NOT evidence. And yet, this is all the NACC has to support its dire warnings and calls for immediate drastic reductions in our use of fossil fuels. There is simply no evidence to back up the Synthesis Team's conclusions. The climate change debate has been raging within the scientific community since the mid-1970s.
Abundant data show the following.
There is no appreciable climate warming today. Contrary to the conventional wisdom and predictions of computer models, the Earth's climate has not warmed appreciably in the past two decades, and probably not since about 1940. Satellite data show no appreciable warming of the global atmosphere since 1979. Radiosonde data from balloons released regularly around the world confirm the satellite data in every respect. Surface temperature data from reliable, well-controlled stations in the continental U.S. likewise show no appreciable warming since about 1940.