RAW MATERIALS forFOOD PRODUCTION
Annual Production of Important Foods
Plant food sources
About 350,000 known plants, and of those, about 30,000 have edible parts, but only about 100 species are commercially grown for food
-50% of calories come from wheat and rice
-~2/3 of calories from wheat, rice and corn
-8 species of animal protein supply over 90% of the world’s needs
-~20% of world consumes over 80% of world’s meat production
-~90% of US grown grain is grown for animal feed
-16 kg of grain Þ 1 kg of meat
By eating grain instead would get 20 times the calories and 8 times the protein