While I agree that the world's appetite for leafy greens will not be sated by growing them in warehouses, the debate over whether worldwide food production can

While I agree that the world's appetite for leafy greens will not be sated by growing them in warehouses, the debate over whether worldwide food production can ever migrate to this type of system should probably be framed in terms of something like protein or calories produced per acre. What this movement is really about (it seems to me) is figuring out a way to feed the developing world in a way that does not involve converting tons of new rainforest to farmland or inundating additional watersheds.