N2O is an important type of greenhouse gas as well as an ozonosphere-destroying material.The annual amount of N2O resulted from human activities is increasing by 0.25% each year.

• 氧化亚氮(N2O)；既是一种重要的温室气体；又是破坏大气臭氧层的物质之一；由人类活动导致的N2O年排放量正以平均每年约0.；25%25的速率增加。