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Proportion of U.S. adults who believe Earth is warming 2008-2018

This survey depicts the responses of U.S. adults as to whether they believe there is solid evidence that the earth is warming, over the period from 2008 to 2018. In the spring of 2018, around 73 percent of respondents stated that there was such evidence.

Percentage of respondents who feel that there is solid evidence the Earth is warming from 2008 to 2018*

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Release date

October 2015


United States

Survey time period

April 29 to May 25, 2018

Number of respondents

751 respondents

Age group

18 years and older

Method of interview

Telephone interview

Supplementary notes

* Original question: From what you’ve read and heard. Is there solid evidence that the average temperature on earth has been getting warmer over the past four decades?
Responses for "not sure" are not reported.

The document does not provide details on surveys in previous years.

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