Animal agriculture seems to me like one of those things that in 50 to 100 years people will look back on with bewilderment. "You mean you birthed whole animals, let them grow for two years, fed them all the while, just to kill them, chop up their remains, and ship that to people?" Plant based protein and maybe even more so cultured/clean meat (e.g. http://www.memphismeats.com/ ) seem likely to totally replace how we…
And then 50 to 100 years after that people will look back on with bewilderment. "You mean you planted whole seeds, let them grow for months, watered them all the while, just to kill them, chop up their leaf, and ship that to people?" Plants are alive too.
How much energy/resources/time does it take to raise plant food sources vs an analogous amount of animal food sources?
Do plants require antibiotics to raise at scale?
What are the environmental tolls taken by raising plants vs animals?