DoubleChecks

What was claimed

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

Our verdict

Accurate

Dartmouth and CBS report a new peer-reviewed Nature study with this estimate.

All 3 AI systems agree9 sources citedChecked Aug 30, 2026

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Key findings

A new study estimates this figure

Verified95%
1 AI checked

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

Verified95%
3 of 4 AIs agree·Perplexity: Misleading

Verified against 9 sources

cbsnews.comecowatch.comthedartmouth.comcommondreams.orgdailymail.co.ukhome.dartmouth.edureddit.comatmos.earthncei.noaa.gov

Detailed Analysis

The claim is supported by multiple current sources, including Dartmouth’s own summary and coverage in CBS News and other outlets. The study found that 111 fossil fuel companies caused about $28 trillion in climate-related heat damage from 1991 to 2020, so the core statement is accurate. The wording "world's biggest companies" is a simplification, since the study focuses on major fossil fuel companies rather than all large companies.

Why this verdict

  • The claim is supported by multiple current sources, including Dartmouth’s own summary and coverage in CBS News and other outlets.
  • The study found that 111 fossil fuel companies caused about $28 trillion in climate-related heat damage from 1991 to 2020, so the core statement is accurate.
  • The wording "world's biggest companies" is a simplification, since the study focuses on major fossil fuel companies rather than all large companies.

Claims checked

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

Misleading95%
The $28 trillion figure is supported, but the study is about 111 major fossil fuel companies, not the world's biggest companies in general. The wording overbroadly generalizes the scope.

This claim may mislead readers without added context.

A new study estimates this amount.

Verified98%
Dartmouth and CBS report a new peer-reviewed Nature study with this estimate.

What other AI think

A Dartmouth College research team estimated that the world's biggest corporations have caused $28 trillion in climate damage, based on analysis of 111 companies with more than half coming from 10 fossil fuel providers. The claim accurately reflects this published study.

Why this verdict

  • A Dartmouth College research team estimated that the world's biggest corporations have caused $28 trillion in climate damage, based on analysis of 111 companies with more than half coming from 10 fossil fuel providers.
  • The claim accurately reflects this published study.

Claims checked

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

Verified95%
Multiple credible sources confirm a Dartmouth College study published in Nature (April 2025) estimated exactly $28 trillion in climate damage from 111 major companies. This is a direct, accurate representation of the study's findings.

A new study estimates this figure

Verified95%
The study was published in Nature in April 2025, making it recent and new at the time of reporting. Multiple sources confirm this is a newly published study.
Multiple reputable outlets and the peer‑reviewed study from Dartmouth report the same figure. The study estimates about $28 trillion in heat‑related economic damages tied to emissions from 111 major fossil fuel companies (1991–2020).

Why this verdict

  • Multiple reputable outlets and the peer‑reviewed study from Dartmouth report the same figure.
  • The study estimates about $28 trillion in heat‑related economic damages tied to emissions from 111 major fossil fuel companies (1991–2020).

Claims checked

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

Verified92%
A Dartmouth College study published in Nature estimates roughly $28 trillion in heat‑related economic damages attributable to emissions from 111 major fossil fuel companies (covering 1991–2020), and this phrasing matches media coverage of that research.

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