DoubleChecks

What was claimed

The world's biggest companies have caused $28 trillion in climate damage, according to a new study

Our verdict

Accurate

Recent coverage of the Dartmouth study reports that 111 major companies were estimated to have caused $28 trillion in heat-related climate damages. The figure is widely repeated across reputable outlets.

All 3 AI systems agree23 sources citedChecked Oct 4, 2026

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Key findings

This figure comes from a new study.

Verified93%
1 AI checked

The world's biggest companies have caused $28 trillion in climate damage, according to a new study

Verified94%
2 of 3 AIs agree·Perplexity: Misleading

Verified against 23 sources

apnews.comnbcnewyork.comecowatch.comnationofchange.orgoutlookbusiness.comcommondreams.orgcbsnews.comintellinews.comtruthout.orgearth.comthedartmouth.comus.headtopics.comground.newsdailyfly.comgizmodo.comphys.orgbloomberg.comphys.orgcounterview.nettheconversation.comthecentersquare.comfortune.comsciencedaily.com

Detailed Analysis

The claim is supported by multiple recent reports about a Dartmouth-led study published in Nature. The study estimates that 111 major companies caused about $28 trillion in heat-related climate damage, with more than half attributable to 10 fossil fuel firms. The wording is broadly accurate, though it simplifies the study by calling it “climate damage” when the estimate is specifically for heat-related damages.

Why this verdict

  • The claim is supported by multiple recent reports about a Dartmouth-led study published in Nature.
  • The study estimates that 111 major companies caused about $28 trillion in heat-related climate damage, with more than half attributable to 10 fossil fuel firms.
  • The wording is broadly accurate, though it simplifies the study by calling it “climate damage” when the estimate is specifically for heat-related damages.

Claims checked

The study says the damage is climate damage in general.

Misleading74%
The study estimate is specifically for heat-related economic damage, not all climate impacts. Sources note that it does not include damages from hurricanes, droughts, floods, and other extreme events.

This claim may mislead readers without added context.

This figure comes from a new study.

Verified93%
The reports say the estimate comes from a recent Dartmouth-led study published in Nature. That matches the claim’s reference to a new study.

The world's biggest companies have caused $28 trillion in climate damage.

Verified96%
Recent coverage of the Dartmouth study reports that 111 major companies were estimated to have caused $28 trillion in heat-related climate damages. The figure is widely repeated across reputable outlets.

What other AI think

A new study estimates that the world's biggest corporations have caused $28 trillion in climate damage. The claim is factually accurate and supported by multiple credible sources reporting on a peer-reviewed study published in Nature by Dartmouth College researchers.

Why this verdict

  • A new study estimates that the world's biggest corporations have caused $28 trillion in climate damage.
  • The claim is factually accurate and supported by multiple credible sources reporting on a peer-reviewed study published in Nature by Dartmouth College researchers.
Multiple reputable news outlets reported that a Dartmouth College research team estimated about US$28 trillion in climate damages attributable to 111 large corporations. The figure and study details (111 companies, majority from ~10 major fossil-fuel firms) are consistently reported and verifiable in the press coverage.

Why this verdict

  • Multiple reputable news outlets reported that a Dartmouth College research team estimated about US$28 trillion in climate damages attributable to 111 large corporations.
  • The figure and study details (111 companies, majority from ~10 major fossil-fuel firms) are consistently reported and verifiable in the press coverage.

Claims checked

The world's biggest companies have caused $28 trillion in climate damage, according to a new study

Verified92%
Press reports (including AP, Phys.org, Fortune and others) summarize a Dartmouth College study estimating roughly US$28 trillion in climate damages from emissions attributable to 111 companies, with over half from about 10 major fossil-fuel firms.

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