September 22, 2014
By Sarah Dutton, Jennifer De Pinto, Anthony Salvanto and Fred Backus
Ahead of the U.N. Climate Summit at the United Nations (click here) this week, most Americans say global warming is having a serious impact now or will in the future, and 54 percent think it is mostly caused by human activity -- the highest percentage in CBS News/New York Times Polls.
Forty-six percent say global warming is a problem that is having a serious impact now, while another 28 percent think it will have a serious impact sometime in the future. About a quarter don't think global warming will have a serious impact at all. These views have changed little in recent years....
