Home » What is the total percentage of nitrogen gas in the air? Air Pollution MCQs What is the total percentage of nitrogen gas in the air? December 29, 2021 12 Views Q. What is the total percentage of nitrogen gas in the air? 12 per cent21 per cent78 per cent87 per cent Answer: 78 per cent.
Which one of the following pollutant (or) pairs of pollutants is formed due to photochemical reactions?
The particulate which is emitted by combustion of petroleum in automobiles and which affects hemoglobin formation is