… Americans who think global warming is happening outnumber those who think it is not happening by a ratio of more than 4 to 1.
Seven in ten Americans (70%) think global warming is happening. By contrast, 15% of Americans think global warming is not happening. …
A majority of Americans (57%) understand that global warming is mostly human-caused. By contrast, three in ten (30%) think it is due mostly to natural changes in the environment. CONTINUED
Yale Program on Climate Change Communication and the George Mason University Center for Climate Change Communication
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