I don't know what point you're trying to make. Growing food is bad for the environment. Especially if you want it cheap enough for poor people to eat.
Obviously that's true, but it's a bit of a bad-faith argument. Producing the amount of soy beans and beef, for example, does not have the same impact on the environment at all. Efficiency matters.
Personally, my position is that the externalities of producing all types of food should be contained in their sale price, which would make meat a lot more expensive and a lot less popular, but trying to force vegetarianism on people is, of course, unduly authoritarian.
