VegEco
Science & Policy

Food systems and climate science

The measurable side of the food-and-climate story: which gases come from where, why methane's short lifetime matters, and how dietary change compares with other mitigation levers.

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Questions this hub answers

How much of global emissions come from food?
Roughly a quarter to a third of anthropogenic greenhouse gas emissions, with animal agriculture responsible for the majority of the food-system share.
Why does livestock methane matter so much?
Methane traps far more heat than CO2 over a twenty-year window but breaks down within about a decade, so cutting it lowers near-term warming quickly.