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Beef produces 85 kg CO2e per kg of food. Tofu produces 2.9 kg CO2e per kg of food.
(ourworldindata.org)
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this post was submitted on 16 Apr 2024
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it's basic physics: animal products consume more energy (calories) than they produce in food because they exert energy on living - moving, eating, converting food to energy, etc.
Eating a plant directly (or with comparable processing to meat) means less wasted energy (as in calories burned compared to calories produced as food) simply because you're going one step higher (lower?) in the food chain to obtain that energy.
brb, adapting my digestive system to directly extract energy from rocks.