0.4 → 400 000 tonnes co2e less about 0.4 tonnes less co2e a year. and about 20 more animals killed. one cow feeds a thousand meals; a chicken feeds six.
method per-person, per-year estimate from the cited study (Poore & Nemecek 2018; FAO), world-average where the study allows; the million-people column is straight multiplication. 'for scale' divides by 0.8 t CO2e, the meat-free yardstick.
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