[QUOTE=RodeoFTW;8667510]
Worldwide, an estimated 2 billion people live primarily on a meat-based diet, while an estimated 4 billion live primarily on a plant-based diet. The US food production system uses about 50% of the total US land area, 80% of the fresh water, and 17% of the fossil energy used in the country. The heavy dependence on fossil energy suggests that the US food system, whether meat-based or plant-based, is not sustainable. The use of land and energy resources devoted to an average meat-based diet compared with a lactoovovegetarian (plant-based) diet is analyzed in this report. In both diets, the daily quantity of calories consumed are kept constant at about 3533 kcal per person. The meat-based food system requires more energy, land, and water resources than the lactoovovegetarian diet. In this limited sense, the lactoovovegetarian diet is more sustainable than the average American meat-based diet.
http://ajcn.nutrition.org/content/78/3/660S.full
Thereâs your answer.[/QUOTE]
But that study says that as of now neither diet will support the food supply that will be needed. Who cares if one is more sustainable if neither are sustainable in the long run. This is why we continue to need science to increase production of both meat and vegetables. Instead many of you are suggesting going back in time and thus decreasing production in both meat and vegetables.
And the water for food production is not as horrible as that 80% number makes it seem as it passed on to the consumer in water in the diet whether it be in meat or vegetables.