Agriculture - WITNESS

The crop and livestock calculates the land surface required to feed humanity (and the amount of crops that can be used for energy).

It addresses the challenge of producing enough food on limited land for a large population by testing different diets and computing the necessary agricultural land area. Food categories are grouped as per the following table, with different effects of global warming for each (depending on climate damage such as drought, flooding or increased crops water needs), as well as different CO2 emissions.

Red meat	White meat	Milk	Eggs	Rice and Maize	cereals	Fruit and vegetables	Fish	Other
Beef herd, dairy herd, Lamb & Mutton	Pig, poultry	Milk	Eggs	Rice, Maize	Barely, Oatmeal, Wheat and Rye	Apples, Bananas, Berries and grapes, Brassicas, Cassava, Cirtus fruit, Onions and leeks, other fruit, other pulses, other vegetables, peas, potatoes, root vegetables, tomatoes	Fish(farmed)	Sugar, cheese, coffee, chocolate, oils, soybean, wine