Rich in nitrogen, melamine gives low-quality food and feed artificially high protein readings.
含有丰富的氮的三聚氰胺使劣质食品和饲料有高蛋白质读数。
2
Producing that amount of food could significantly increase levels of carbon dioxide and nitrogen in the environment and cause the extinction of numerous species.
生产如此数量的粮食可能大大提高环境中二氧化碳和氮的水平，引起很多物种的灭绝。
3
Cereals and carbohydrates had the smallest footprints, with each pound of food releasing only 3 lb of greenhouse gases and almost no nitrogen pollution.