Most adult amphibians respire through their a) skin only b) lungs only c) skin and gills d) skin and lungs

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.

im not in connections yet but i might can you some questions. what grade are you in?