Physorg: Americans fall into six distinct groups regarding their climate change beliefs, attitudes, and behaviors, according to a new report, “Global Warming’s Six Americas,” by researchers at Yale and George Mason universities. The researchers, who surveyed 2,129 adult Americans in the fall of 2008, found that these “six Americas” include: * The Alarmed, (18 percent of the population) are most convinced that global warming is happening, caused by humans, and a serious and urgent …