The source worded the question as follows: "On the next few screens, you’ll see a series of statements about science and medicine. For each
of them, please indicate how confident you are that the statement is correct: The average temperature of the world is rising, mostly because of man-made heat-trapping greenhouse gases."
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U.S. poll on human activity being the main cause of global warming 2014
This survey, conducted across the United States in March 2014, shows public opinion regarding man-made heat trapping greenhouse gases as the main cause of rising global temperatures. During the survey, 13 percent of respondents were extremely confident that greenhouse gases caused by human activity are the main cause of global warming.
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AP-GfK Poll. (April 23, 2014). How confident are you that the following is correct?: The average global temperature is rising due to man-made greenhouse gases [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved August 05, 2026, from /statistics/298599/united-states-rising-temperature-cuase-greenhouse-gases-man-made-public-opinion/
AP-GfK Poll. "How confident are you that the following is correct?: The average global temperature is rising due to man-made greenhouse gases." Chart. April 23, 2014. ÌÇÐÄÆƽâ°æ. Accessed August 05, 2026. /statistics/298599/united-states-rising-temperature-cuase-greenhouse-gases-man-made-public-opinion/
AP-GfK Poll. (2014). How confident are you that the following is correct?: The average global temperature is rising due to man-made greenhouse gases. ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: August 05, 2026. /statistics/298599/united-states-rising-temperature-cuase-greenhouse-gases-man-made-public-opinion/
AP-GfK Poll. "How Confident Are You That The following Is Correct?: The Average Global Temperature Is Rising Due to Man-made Greenhouse Gases." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 23 Apr 2014, /statistics/298599/united-states-rising-temperature-cuase-greenhouse-gases-man-made-public-opinion/
AP-GfK Poll, How confident are you that the following is correct?: The average global temperature is rising due to man-made greenhouse gases ÌÇÐÄÆƽâ°æ, /statistics/298599/united-states-rising-temperature-cuase-greenhouse-gases-man-made-public-opinion/ (last visited August 05, 2026)
How confident are you that the following is correct?: The average global temperature is rising due to man-made greenhouse gases [Graph], AP-GfK Poll, April 23, 2014. [Online]. Available: /statistics/298599/united-states-rising-temperature-cuase-greenhouse-gases-man-made-public-opinion/
