How does nitrogen oxides are produced and their air environment impact

It happens during combustion and impacts the environment because the plants and trees take in that and it can cause them to die.

exposure to hazardous carcinogens and toxic substances can cause breathing problems, such as copd and various types of cancer. it also increases the risk of heart attacks and strokes and has serious (but no less unattractive) side effects, such as aging, yellow teeth, a terrible smell and damage to the vocal cords.

the right answer is: time