Under Trump, Fewer Republicans Think Global Warming Is Caused by Humans

More than a full year into the Donald Trump experience, Republicans have grown more skeptical about climate change compared with the year prior, according to new polling data from Gallup released on Wednesday. 

Just 35 percent of Republicans believed global warming was caused by humans, compared with 40 percent at about this time in 2017 when Trump had barely taken office. A full 89 percent of Democrats, meanwhile, believed humans caused global warming.

Thirty-three percent of Republicans said they worried a great deal or fair amount about global warming in Gallup's 2018 environmental survey, down 3 percentage points from the year prior. Ninety-one percent of Democrats were worried a great deal or fair amount.

Just 34 of GOP respondents said they thought we're already seeing effects of global warming—down 7 percentage points from 2017—and 69 percent of Republicans thought the seriousness of global warming had been generally exaggerated, an uptick of 3 percentage points from the year prior. Only four percent of Democrats said global warming had been exaggerated.

Some Republicans also doubted most scientists believe global warming is happening. Just 42 percent said most scientists believe global warming is occurring, down from 53 percent last year. Some 97 percent of experts believe that global warming is happening and is caused by human activities.

There was, however, one area where GOP respondents were more concerned about global warming. Eighteen percent felt they would see effects from global warming in their lifetime, a 4 percentage point rise from 2017, according to Gallup.

The Gallup survey interviewed 1,041 adults from March 1 through March 8 and had a margin of error of plus or minus 4 percentage points.

Trump, who is a Republican, has long expressed skepticism about climate change. He once tweeted he thought it was a Chinese hoax and further posted in 2014: "This very expensive GLOBAL WARMING bullshit has got to stop. Our planet is freezing, record low temps, and our GW scientists are stuck in ice." 

Trump's administration has replaced or changed references to climate change and renewable energy on websites across the federal government, studies showed. The Federal Emergency Management Agency (FEMA) recently omitted any reference to climate change, sea levels rising and global warming from its four-year strategic plan.

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