What are two zones of respiration

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.

answer; i believe its echoic memory,it is believed to last three to four seconds; good luck

the index of refraction of the second medium is higher. i just took the test trust me !