harmful nitrogen

基本解释

The yields increase with the increasing of Nitrogen, but meanwhile, harmful NO3-N also increase.
随着氮肥用量的适量增加，西芹产量明显提高，但对人体有害的成分NO3-N含量也随之增加；
The beneficial and harmful effects of nitrogen on the properties of stainless steels are reviewed.
总结了氮在不锈钢中有害和有利正反两方面的作用。
High concentration of sulphur dioxide, nitrogen, oxides and dust have long been known to be harmful.
人们早已知道，二氧化硫、氮、氧化物和尘埃浓度高是有害的。

Fuel cells offer several advantages: they do not have moving parts and there is no burning involved, so there are negligible emissions of environmentally harmful gases like nitrogen, sulfur oxide and carbon monoxide.
FORBES: Magazine Article
Burning diesel versus gas results in higher levels of nitrogen compounds and soot, both of which can be very harmful to human health.
FORBES: 2012 Mercedes-Benz GL 350 BlueTEC Test Drive and Review: A Hug for Diesel