if you kept your cat indoors: what it is worth, in numbers

40 → 40 million birds and small mammals on the order of dozens of birds and small mammals a year, per cat. not on the carbon ledger at all.

method per-person, per-year estimate from the cited study (Loss et al. 2013; Kays et al. 2020), 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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