Eggs vs Farmed fish: carbon footprint
Eggs or Farmed fish? Here's what each one costs the climate, measured per kilo over its whole life.
Eggs runs about 4.67 kg CO₂e a kilo. Farmed fish runs 13.63.
Farmed fish is the heavier choice, about 2.9× Eggs.
Swap Farmed fish for Eggs and you cut about 8.96 kg a kilo, near 66% off.
Per kilo, that gap is a 52 km drive in a diesel car.
Eggs: Middling. Hens eat feed, but there's no methane belch, so eggs sit well below beef.
Farmed fish: Farmed fish and shrimp pay for feed, energy to run the ponds, and sometimes cleared mangroves.
Per-kilo numbers skip portion size and how the food was farmed, so take them as the shape of things, not the last word.
More match-ups
Figures from OWID / Poore & Nemecek 2018, licensed CC-BY 4.0.
How we get these numbers: Methodology.