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Agriculture is responsible for between half and two-thirds of emissions of two especially toxic greenhouse gases , methane and nitrous oxide .

农业占到有毒温室气体如甲烷和氮的氧化物排放的二分之一到三分之二。

Other reactive trace gases such as nitrous oxide and methyl iodide also remain at elevated and aberrant levels .

其他活性示踪气体，如一氧化二氮、碘甲烷也处于异常爬升的水平。

Nitrous oxide is destroyed in the stratosphere and removed from the atmosphere more slowly than methane , persisting for around 114 years .

一氧化二氮在平流层中被破坏，它从大气中被除去要比甲烷慢得多，能存在约114年。

Nitrous oxide is stable at ground level but breaks down in the upper atmosphere to form compounds that trigger chemical reactions that destroy ozone .

一氧化二氮在地平面时是稳定的，但在高层大气中则分解而形成某种化合物，从而引发化学反应而破坏臭氧层。

The daily variation of nitrous oxide emission from vegetable system .

菜地系统土壤氧化亚氮排放的日变化研究。