Arguably the ideal population of the continent is impossible to gauge. Utopian ideal vs utopian ideal. But there are many factors that would improve the health of the environment that sustains us all.
Eating native animals more suited to the environment is a no brainer for meat eaters.
Without meat, production of protein vegetables such as legumes would need to sky rocket.
Less land clearing across the board is better for the environment.
Monocultures of any kind, whether meat or vegetable are problematic on land not suited.
