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Climate Fact-Check September 2025

Aerial view of a dense forest with a text overlay that reads 'Climate Fact Check: September 2025 Edition'.

From ClimateRealism

By Guest Contributor

Guest Post by: The Committee for a Constructive Tomorrow, The Heartland Institute, the Competitive Enterprise Institute, the Energy & Environmental Legal Institute, and the International Climate Science Coalition, and Truth in Energy and Climate.

Editor’s note: This summary serves as a fact check on the top false claims made about climate change by the media in September 2025. 

Debunking the latest unscientific fearmongering on the hottest year, wildfires, ‘bigger hail’, corals & alleged climate-caused insurance rate increases!

Infographic showing global mean temperature changes from 1850 to 2024 with a graph and key dates highlighted. Includes WMO logo and a claim about the temperature record.
Links: World Meteorological Organization post, Dr. Rohde counter.
Infographic about China's efforts in curbing climate change, referencing the University of Michigan and presenting claims and fact-checks regarding solar power capacity and coal consumption.
Links: X comment, Chinese installed solar capacity claims, coal record, new Chinese coal plants.
A screenshot of an article titled 'September 5th: No, Al Jazeera, climate change is not resulting in more air pollution from wildfires', featuring a fact-check and claim related to wildfires and air pollution, with the Al Jazeera logo.
Links: Al Jazeera post, NASA satellite data, other satellite data and reconstructions.
A fact check on a claim from Realtor.com discussing the effects of climate change on homeowners insurance rates, highlighting that rising costs are due to property value increases rather than climate risk.
Links: Realtor.com article, wildfires, flood damage data, hurricane data, wildfire severity.
A summary of claims and fact-checks regarding climate change, featuring a header from the New York Times discussing heat-related deaths in Europe and a detailed breakdown of claims versus factual data.
Bar chart depicting annual average excess deaths due to non-optimal temperatures by region from 2000 to 2019, showing categories for moderate cold, extreme cold, moderate heat, and extreme heat.
Links: The New York Times article, temperature risk.
Fact-check on coral survival claims, debunking assertions from a New York Times article about climate change impacts on coral reefs.
Links: The New York Times article, 60 million years of coral, runoff information, chemical information, UV exposure, local sea level drop.
An article excerpt discussing claims about climate change and hail size, featuring sections titled 'Claim' and 'Fact-Check', with references to a study published in Nature Communications.
Links: Nature Communications paper, RCP8.5 issues.

Until next month, enjoy these and other great climate fact checks at:

ClimateRealism.com

  • Climate Change Is Not Causing New England’s ‘Creepy’ Bacteria and Bugs, Boston Globe
  • False, New York Times, Climate Change Isn’t Causing More European Heat Deaths
  • Get the Facts Straight, The Independent, Island Nations Are Growing, Not “Sinking Into the Sea”

ClimateDepot.com

  • The climate agenda has entered the operating room. From anaesthesia to heart surgery, medical procedures are now being scrutinised based on their climate impact
  • NYT: ‘It Isn’t Just the U.S. — The Whole World Has Soured on Climate Politics’ – ‘The retreat from climate politics has been widespread’
  • UK Lord Brooke promotes assisted suicide bill to limit population & climate change: ‘Just think what the 2025 (population) numbers would be if abortion had not been legalized’

Wattsupwiththat.com

  • Claim: Climate Change is Making Amazon Rainforest Trees Fatter
  • Germany Sees Bumper 2025 Harvest As Earlier Climate Forecasts Of A “Hellish Summer” Fail
  • Rigged Report By National Academies Aims To Thwart Trump Energy Agenda

Originally posted at JunkScience.com, reposted with permission.

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