But how will modifying our diets make a difference? We can compare the amount of resources needed to produce meat and crops1. For example, we need almost 20,000 liters of water to produce a kilogram of beef, whereas only 150 liters of water is needed to produce a kilogram of wheat. Similarly, one hectare (or 10,000 square meters) of farmland that is used for raising livestock produces about 227 kilograms of beef, but the same amount of farmland can produce 13,600
kilograms of carrots, 18,000 kilograms of potatoes, or 22,7000 kilograms of tomatoes. It’s clear that we can make more efficient use of land and water if we produce crops instead of meat.