Various: A new poll among 3,146 earth scientists found that 90 percent believe global warming is real, while 82 percent agree that human activity been a significant factor in changing mean global temperatures. The survey, conducted among researchers listed in the American Geological Institute’s Directory of Geoscience Departments, “found that climatologists who are active in research showed the strongest consensus on the causes of global warming, with 97 percent agreeing humans play a role”. …