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Physics

Quantum quirk explains why carbon dioxide causes global warming

A phenomenon called the Fermi resonance, which affects how molecules vibrate, is responsible for a large part of carbon dioxide’s planet-warming effect

By Alex Wilkins

13 February 2024

Carbon dioxide emissions are warming the planet

Rupert Oberhauser / Alamy

Carbon dioxide is uniquely suited to cause global warming because of a coincidental quirk of quantum mechanics.

Global warming is largely caused by carbon dioxide and other gases absorbing infrared radiation, trapping heat in Earth’s atmosphere – known as the greenhouse effect.

The most accurate climate models use precise measurements of the amount of radiation CO₂ can absorb to calculate how much heat will be trapped in the atmosphere.…

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