A(n) is a lesion that is a different color than the color of the skin. ulcer primary lesion fissure secondary lesion

significant amounts of nitrogen oxides, carbon monoxide, and other pollution

explanation:

passenger vehicles are a major pollution contributor, producing significant amounts of nitrogen oxides, carbon monoxide, and other pollution. in 2013, transportation contributed more than half of the carbon monoxide and nitrogen oxides, and almost a quarter of the hydrocarbons emitted into our air.

not sure if this what   you'r looking for would be percent composition