10 Fact Checks About Climate Change Politifact

Protestors urging action on climate change marched in New York City on Sept. 22, 2014. (Getty) We’re looking back at 10 of our recent fact-checks on climate change in light of the United Nations summit in New York this week. These fact-checks cover some of the key points of the climate change debate. 1.

"Climate change is a hoax." - Pants on Fire. Earlier this year we looked at a detailed video from Louisiana congressional candidate Lenar Whitney, who repeated the assertion that climate change is a hoax. We found -- as we have before -- that there’s an overwhelming consensus among respected scientists that human-caused global warming is real. In this fact-check, we looked at some of Whitney’s supporting evidence to argue that global warming is a hoax and found that it was weak. We rated her statement Pants on Fire. 2.

The United States is the leading nation in the world "with the highest amount of doubt about the conventional wisdom of climate change." - Mostly True. As part of our series on Project 2025, we look at some instances where President Donald Trump and Project 2025 agree on climate change and fossil fuels — beginning with the rollback of climate... In an hourlong address before the U.N. General Assembly on Sept. 23, President Donald Trump lashed out at those promoting “the green energy agenda.” Along the way, he made numerous false and misleading claims about renewable energy and climate change, many of which we’ve fact-checked... The Environmental Protection Agency is holding public hearings this week on its effort to undo the legal foundation for its regulation of greenhouse gases, the heat-trapping gases that cause climate change.

In a major policy shift announced in late July, the Trump administration EPA said it would rescind the so-called “endangerment finding,” which allows the agency to regulate such emissions, arguing that legal and scientific... Unfounded rumors linking an extreme weather event to human attempts at weather modification are again spreading on social media. It is not plausible that available weather modification techniques caused or influenced the July 4 flash flooding along the Guadalupe River in Texas. We explain what’s known about how the catastrophic L.A. wildfires started and the factors that scientists do — and don’t — think contributed. A Sept.

14 article (direct link, archive link) circulating on Facebook claims a large group of scientists downplayed the dangers of climate change in a signed declaration. "Thousands of Scientists Unite to Expose ‘Climate Crisis’ Hoax," reads the headline of the article, which was published on the website News Addicts. The article was shared more than 400 times in six weeks on Facebook, according to Crowdtangle, a social media analytics tool. Follow us on Facebook! Like our page to get updates throughout the day on our latest debunks Thousands of scientists did not sign the document referenced in the article.

The document lists only around 1,600 purported signatories, the vast majority of whom have no listed expertise in climate science. Hundreds of the purported signatories are not listed as being scientists of any kind, according to a USA TODAY count. The Earth’s climate is changing, and it is projected to continue changing over the next century. The magnitude of climate change beyond the next few decades will depend primarily on the amount of greenhouse (heat-trapping) gases emitted globally and on the remaining uncertainty about the Earth’s climate's sensitivity to those... With significant reductions in greenhouse gas (GHG) emissions, the global annual average temperature rise could be limited to 2°C or less. However, without major reductions in these emissions, the increase in annual average global temperatures relative to preindustrial times could reach 5°C or more by the end of this century.

The global climate continues to change rapidly compared to the pace of natural climate variations throughout Earth’s history. Trends in globally averaged temperature, sea level rise, upper-ocean heat content, land-based ice melt, arctic sea ice, depth of seasonal permafrost thaw, and other climate variables provide consistent evidence of a warming planet. These observed trends are robust and confirmed by multiple independent research groups worldwide. Figure 1 shows global average temperature anomalies; since the 1880s, the global average temperature has warmed approximately 1°C.

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