>>12254176According to a 2018 FAO estimate, with optimal plant choices out of what is currently available and no solution to aquifer depletion, glacial meltwater depletion, soil calcium depletion, soil iron depletion, soil magnesium depletion, soil manganese depletion, soil phosphorus depletion, soil sulphur depletion, soil tin depletion and soil zinc depletion there is enough fertile land to feed 11 billion people. That's the maximum.
And at current depletion rates of these sources with no change to current renewal rates, it drops to 9 billion by 2050 and 4.7 billion by 2100.