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If you really want to have an impact while still eating meat, just stop eating beef altogether

The amount of food and water needed to produce 1kg of beef meat is just insane

Eat poultry or fish instead

>Cattle is the worst at something like 15:1. Aquaculture, specifically tilapia and catfish, is good at under 2:1

The starting point they use for fish is the wild fish caught to feed them. The real impact is thus probably not better than cattle's.

Cattle is sometimes bred extensively on land not suited for agriculture and the only way to turn grass into food. It's not all bad.

Fish used to be a good idea. Now it has a lot of mercury in it.