The Human Impacts Database

A collection of useful numbers for quantifying the impacts of the human presence on Earth.


Quantity Value HuID Source Type
Feed-to-edible protein conversion efficiency of beef ≈ 10 % 32109 Fry, J.P., Mailloux, N.A., Love, …
Feed-to-food caloric conversion efficiency of chicken 13 ± 4 % 33540 Shepon, A., Eshel, G., Noor, …
Production yield of beef ≈ 220 kg / cow 33961 FAO (Food and Agricultural Organization …
Feed-to-edible protein conversion efficiency of common carp ≈ 15 % 34542 Fry, J.P., Mailloux, N.A., Love, …
Standing population of sheep ≈ 1.4 × 109 sheep 34864 FAO (Food and Agricultural Organization) …
Annual captured Humboldt squid mass ≈ 8.9 × 108 kg / yr 38638 FAO (Food and Agriculture Organization …
Total number of chickens slaughtered for poultry since 1960 ≈ 1.8 × 1012 chickens 38712 FAO (Food and Agricultural Organization) …
Feed-to-edible protein conversion efficiency of pork ≈ 15 % 39603 Fry, J.P., Mailloux, N.A., Love, …
Global calorie supply from poultry meat 61 kcal / capita / day 40696 FAO (Food and Agricultural Organization …
Total annual harvested seafood mass ≈ 1.79 × 1011 kg / yr 41132 FAO (Food and Agriculture Organization …
Feed-to-food protein conversion efficiency of chicken 21 ± 7 % 41385 Shepon, A., Eshel, G., Noor, …
Global poultry protein supply 5.4 g / capita / day 42205 FAO (Food and Agricultural Organization …
Global pig meat protein supply 4.5 g / capita / day 43014 FAO (Food and Agricultural Organization …
Global calorie supply from eggs 38 kcal / capita / day 43153 FAO (Food and Agricultural Organization …
Standing population of livestock ≈ 4.6 × 1010 animals 43599 FAO (Food and Agricultural Organization) …