Biologist David Pimentel of Cornell University estimates that a box of salad with 80 calories of energy consumes-from cultivation to cold storage to cleaning to transport to the tables of consumers on the US East Coast-4600 calories of petrochemical fuels. In other words, the production of one calorie of food energy expends 57 times as much petrochemical energy!
據康乃爾大學生物學者比門鐵爾估計，一盒含 80 卡熱量的沙拉，從栽種、冷藏、清洗，一直到運送到美國東岸消費者的餐盤中，總共耗用了 4,600 卡化石燃料，也就是每生產 1 卡食物熱量，需耗用 57 倍的化石能量！