[mbfg]

once lab meat/lab milk can be produced at or below cost of farming, cows will likely go extinct, unfortunately.

A less vulgar correlary is that once horse racing is outlawed, horses will mostly go extinct as well, as the racing industry is responsible for being able to acquire feed/hay/veternary care for the average horse owner. Without it will be practically impossible to keep 'pleasure' horses.

We humans are nasty creatures.

[RehnoLindeque]

From what I've heard most land-use in the world goes towards animal agriculture - mainly for growing feed. Don't quote me, but I think it's over 40% of all land use in the USA. On balance I'd be far more concerned about the destruction of habitat for already endangered wildlife.

[nitrogen]

What percentage of usable land is actually used, and what percentage of that usable land percentage is used destructively?