I liked the first part of the movie, when they talked about growing organic grains and vegetables, but then the story tried to explain how to correctly raise livestock.
Scientifically, we are at a point that raising animals for food has issues regarding the environment, animal rights, and our health. So, I didn't find the later part of the documentary in line with the concerns of United Nations and other major environmental institutions.
If we look at the issue of world hunger today, with all the industrialized animal farming methods, we realize that still we cannot feed everyone on the planet, let alone we raise animals in a slower pace methods. Of course it is not going to be sustainable in terms of being able to feed people.
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