Table 1.

Environmental impact of farming on common protein sources.

	Insect	Chicken	Pig	Cow
Greenhouse gases released per kg of live weight, g	2	NA	1130	2850
Feed required per kg of live weight, kg	1.7	2.5	5	10
Land required per g of protein	18	51	63	254
Water required per g of protein, liter	23	34	57	112

Cadinu, Barra, Torre, Delogu and Madau [5], Aiello, et al. [6], Alexander, et al. [7], Agnieszka de Sousa [8].