Where is the long, pointed beak of a woodpecker most clearly an adaptation? A. A tropical grassland
B. A hot desert
C. A temperate forest
D. A cold tundra

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.