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Actuarial Report Cites Billions of Climate Deaths, Says Data Unverified

8/8/2026

43 9 Full Breakdown

Summary

Story summary

The UK Institute and Faculty of Actuaries and Exeter released a 2025 report listing >4 billion deaths at 3 °C warming, >2 billion deaths at 2 °C warming, and projected GDP losses of 50 % and 25 % respectively.
The 4BD website claims the >4 billion figure means about 80 million deaths per year through 2075.
The report’s authors say the figures are not forecasts and lack evidence for 2 billion deaths at 2 °C.

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Story summary

The UK Institute and Faculty of Actuaries and Exeter released a 2025 report listing >4 billion deaths at 3 °C warming, >2 billion deaths at 2 °C warming, and projected GDP losses of 50 % and 25 % respectively.
The 4BD website claims the >4 billion figure means about 80 million deaths per year through 2075.
The report’s authors say the figures are not forecasts and lack evidence for 2 billion deaths at 2 °C.