The latest report from the Yale Project on Climate Change Communication shows that American adults who are "alarmed" about climate change have grown from 10 percent in 2010 to 16 percent in 2012. At the same time, the people who are "dismissive" about climate change have halved from 16 percent in 2010 to 8 percent in 2012.
Mind you, this is data from September 2012; before superstorm Sandy made it's own very persuasive case about global warming and consequent rising sea levels. So this report is not a case of opportunistic sampling. On the contrary, it's a project that started in 2008 and has been tracking the opinions of same randomly selected 1,000+ Americans ever since.
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In their initial study the researchers identified what they call the "Six Americas" in terms of people's opinions on global warming. The six are Alarmed, Concerned, Cautious, Disengaged, Doubtful and Dismissive (the percentages of each, as of Sept. 2012, are shown above).
Now while those folks who still deny the science might be alarmed by the growing number of people who are alarmed (including me), and call us alarmists, I am sticking to my position that it's appropriate to be alarmed. I am alarmed because I have been reading the science and reporting on it for about 20 years and as much as I detest the conclusions that are being drawn, I can't escape their veracity. To borrow a line: If you aren't alarmed, you aren't paying attention.