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For every 100 calories of grain fed to farmed animals, you only get:
40 calories of milk
22 calories of eggs
12 calories of chicken
10 calories of pork
3 calories of beef
This is an extravagantly inefficient way to feed the world. https://www.nationalgeographic.com/foodfeatures/feeding-9-billion/
40 calories of milk 22 calories of eggs 12 calories of chicken 10 calories of pork 3 calories of beefThis is an extravagantly inefficient way to feed the world. https://www.nationalgeographic.com/foodfeatures/feeding-9-billion/
The protein conversion efficiencies is just as troubling:
"(G)rowing food exclusively for direct human consumption could...increase available food calories by as much as 70%, which could feed an additional 4 billion people (more than the projected 2â3 billion people arriving through population growth)."
https://iopscience.iop.org/article/10.1088/1748-9326/8/3/034015/meta
https://iopscience.iop.org/article/10.1088/1748-9326/8/3/034015/meta
Farming that imitates natural ecosystems is how it can be done in the most sustainable & regenerative manner, although simply switching to a focus on diverse plant-based farming is also a massive improvement. https://twitter.com/NicholasDCarter/status/1160238999027326977?s=19
Even if a fraction of cropland used for animal feed is transitioned to cropland for human food, we'd get a massive increase in food supply.
The evidence for this is clear in this Harvard study by @HHarwatt & @MattHighKick http://animal.law.harvard.edu/wp-content/uploads/Eating-Away-at-Climate-Change-with-Negative-Emissions%E2%80%93%E2%80%93Harwatt-Hayek.pdf
The evidence for this is clear in this Harvard study by @HHarwatt & @MattHighKick http://animal.law.harvard.edu/wp-content/uploads/Eating-Away-at-Climate-Change-with-Negative-Emissions%E2%80%93%E2%80%93Harwatt-Hayek.pdf
