Which of the following is a byproduct of aerobic activity?
a. carbon dioxide
b. lactic acid
c. phosphate
d. sodium nitrate

can you me this person for the answer

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.