Question

I want it's answer very urgent​

Answer 1

Answer:

nitrogen oxides can cause environmental health hazards when they react with sunlight and other chemicals to form smog

Answer 2

Answer:

Two gases, nitrogen and oxygen, make up most of the atmosphere by volume. They are indeed important for maintaining life and driving a number of processes near the surface of the Earth. Many of the so called "minor gases" play an equally important role in the Earth system.The enormous energy of lightning can also cause nitrogen and oxygen atoms in the atmosphere to combine to form nitrogen oxides, which dissolve in rain to form nitrates. The oxygen from the atmosphere is breathed in by animals in the biosphere, and returned to the atmosphere as carbon dioxide, exhaled by animals.