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PolitiFact FL: Not all 1.6K signatories of declaration against climate change were scientists

Emily Michot / Miami Herald
Miami Herald

*WLRN has partnered with PolitiFact to fact-check Florida politicians. The Pulitzer Prize-winning team seeks to present the true facts, unaffected by agenda or biases.

"There is no climate emergency," posts proclaimed on X, formerly Twitter, sharing a message allegedly supported by more than a thousand scientists.

Some X users circulated a "world climate declaration" that they claimed proves the climate crisis is a "hoax" and is "based on politics, not on science."

"1,609 scientists, including two Nobel laureates, gathered together to sign a declaration, proclaiming that ‘there is no climate emergency,’" a Sept. 15 X post said.

The claim misleads by overlooking a few details.

First, there is wide consensus among climate scientists, scientific associations and institutions that climate change is real and is caused primarily by humans burning fossil fuels. Nearly 200 scientific organizations around the world assert that climate change is caused by human action.

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Second, the statement about this document being signed by 1,609 scientists glosses over key information about both the document and its signatories. The document was published by Climate Intelligence or Clintel, a group founded by science journalist Marcel Crok and geophysics professor Guus Berkhout, who began his career with oil giant Shell in 1964.

Clintel’s website says the group aims to "generate knowledge and understanding" of the causes and effects of climate change and climate policy. It makes its stance clear: "The climate view of CLINTEL can be easily summarized as: There is no climate emergency."

A scan of the 1,609 signatures shows that not all were scientists. Several were from other professions; some listed no science background at all.

In September 2022, Agence France-Presse analyzed a previous version of this document published in 2020, which then had 1,200 signatories. Many signatories were scientists of various kinds, including 40 geophysicists and 130 geologists. Only 10 of the signatories described themselves as climatologists or climate scientists, Agence France-Presse found.

About 200 signatories were engineers. Other professionals were mathematicians, medical doctors and agricultural scientists. Six signatories were deceased.

The updated version with 1,609 signatories, published Aug. 14, marked 12 people as deceased. Among the scientists, specialties included geology, chemistry, physics and agriculture. Those with climate expertise were few.

The list included engineers, doctors, lawyers, mathematicians, architects, entrepreneurs, and economists. Others did not list any occupation at all. Some descriptions read:

  • "Sceptical (sic) Scientific Contrarian in the Climate Debate"
  • "Leadership development and coaching"
  • "Physicist and YouTuber"
  • "Sculptor, designer and innovator"

The two Nobel laureates who signed the declaration — John F. Clauser (the 2022 winner for physics) and Ivar Giaever (who shared the 1973 prize for physics — have a history of denying the climate crisis.

The declaration — a version of which was published as early as 2019 — made six claims, including that carbon dioxide is not a pollutant. Others downplay the threat, severity and impact of climate change such as, "warming is far slower than predicted," and "global warming has not increased natural disasters." This list of claims has been assessed as having "very low" credibility by scientists, as reported in a review published by Climate Feedback, a global network of scientists that debunks inaccurate climate change claims. The reviewers said the statement gave cherry-picked information about carbon dioxide and climate change impact and presented them in a "biased and misleading way."

The statement that "1,609 scientists signed a declaration saying ‘there is no climate emergency’" contains an element of truth but ignores critical facts that would give a different impression. We rate it Mostly False.

PolitiFact researcher Caryn Baird contributed to this report.

Our Sources

Loreben Tuquero is a reporter covering misinformation for PolitiFact.
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