methane nitrous-oxide

Insects produce less ammonia than pig and poultry farming, ten times less methane than livestock, and 300 times less nitrous oxide.

昆虫产生的氨比猪和家禽少，它们产生的甲烷比家畜少十倍，而产生的一氧化二氮比家畜少三百倍。

The problem with this method is that methane and nitrous oxide emissions fluctuate strongly in time and space.

这种方法的问题是，甲烷和一氧化氮的排放量在不同时间和空间波动很大。

The emission of methane and nitrous oxide is largely the result of agricultural activities; nitrous oxide from fertilisers and methane mostly from cows.

甲烷和一氧化二氮的排放主要是农业活动的结果：一氧化二氮源于化肥而甲烷主要来自奶牛。