Research conducted on what happens when atoms get excited has helped in the identification of the atoms in the
universe. What happens when atoms get excited?

Atoms release a particular color of light.

Explanation:

Atoms release a particular color of light

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.