Associated Press: The number of Americans who believe there is solid evidence the Earth is warming because of pollution is at its lowest point in three years, according to a survey released Thursday. The poll of 1,500 adults by the Pew Research Center for the People & the Press found that only 57% believe there is strong scientific evidence the Earth has gotten hotter over the past few decades, and as a result, people are viewing the situation as less serious. That’s down from 77% in 2006, and 71% …