We will be awash in lentils!

The demented level of factory farming had nothing to do with human overpopulation, but everything to do with human culture's demand for animal products that are entirely unnecessary for survival. If we change our culture to eliminate animal products, we will eliminate a huge source of wasted resources and labor. Think of how much less plant agriculture would be required if we didn't have to feed 33 billion chickens, almost two billion sheep, a billion and a half cattle, a billion pigs.

If we just grew food we can eat, instead of wasting land, effort, and resources both directly and indirectly supporting animal agra, we wouldn't have such huge problems.

"But baaaaaaconnnnnn." "I can't liiiiiive without eeeeegggggs." "Cheeseburgers taaaaaaaste too good give up" "it's because there's too many huuuuuumanssss"

Animal agriculture is very inefficient, because of tropic levels.

Looking on Wikipedia, dressed broiler chicken carcasses have a feed conversion ratio of about 4. That is to say, a 4lb whole chicken you buy from the butchers case would have required about 12 lbs of feed over its ~2 month life.

An online calorie counter says 4lb of raw whole chicken is 3856 calories. By contrast, a 1lb bag of cornmeal has ~3300 calories. 12 lbs of cornmeal have just over 10x the calories of 1 chicken.

Even comparing the differences in yield between chickpeas and corn, we get way more calories per acre from hummus than Buffalo wings.

In the US, we get 36% of our calories from animals, but use an order of magnitude more space to raise them. We grow more acreage of feed crops than crops that get directly eaten by humans. Fully 40% of the continental US is devoted to raising livestock, which is insane.

We don't factory farm because there's 8 billion humans to feed. We factory farm because we want "a chicken in every pot".

”The problem that nobody ever talks about is overpopulation"

Outright untrue, in both ways. People always talk about it, and it remains not the problem. The problem is distribution, which is largely due to greed and overconsumption. The problem is that farmers breed what they can sell, and people buy so much meat just to have access to it in case they want it eventually.

I found a third way it's incorrect: we don't need animal farms to feed people in the first place. We could simply eat plants instead of feeding them to animals.

Getting downvoted but you are right.

Pretty much all of modern problems can be traced to overpopulation.