For those of you who think the existence of the phenomenon of global warming is debatable, Scientific American has an article by Michael Shermer entitled: “The Flipping Point: How the evidence for anthropogenic global warming has converged to cause this environmental skeptic to make a cognitive flip.” (Quite a mouthful.)
Apparently the approach used by the environmental activists had turned him off to their message in the past. His mind was changed by, among other things, a speech by Al Gore which included before-and-after photographs of disappearing glaciers as well as Jared Diamond’s excellent book, Collapse.
He closes with:
According to Flannery, even if we reduce our carbon dioxide emissions by 70 percent by 2050, average global temperatures will increase between two and nine degrees by 2100. This rise could lead to the melting of the Greenland Ice Sheet, which the March 24 issue of Science reports is already shrinking at a rate of 224 ±41 cubic kilometers a year, double the rate measured in 1996 (Los Angeles uses one cubic kilometer of water a year). If it and the West Antarctic Ice Sheet melt, sea levels will rise five to 10 meters, displacing half a billion inhabitants.
Because of the complexity of the problem, environmental skepticism was once tenable. No longer. It is time to flip from skepticism to activism.