this post was submitted on 25 Jun 2023
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The maths works as shown in this paper. The key change is to use less animal products. Reducing food waste is also good and doing both can decrease the agricultural land globally, if done enough.
As for gardening being more productive per area. This one is an example from Australia.
As for the issue of hunger being a politcal one. The UN estimates 70% of people effected by hunger live in areas with an active war.