By Will Dunham WASHINGTON (Reuters) - American scientists and the general public hold vastly different views on key scientific issues including the role of people in causing climate change, the safety of genetically modified food, and evolution, a poll released on Thursday showed. Eighty-seven percent of scientists questioned by the Pew Research Center said human activity was the main cause of global climate change, compared with 50 percent of the public. The issue has become increasing divisive, with some leading conservatives expressing doubt that human activity like the burning of fossils fuels that release greenhouse gases is driving a global warming trend. There was an even bigger chasm over genetically modified foods, with 88 percent of the scientists saying they were safe to eat, compared with 37 percent of the public.
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