4. Think about a food web in a marine, fresh-
water, or terrestrial ecosystem. Describe a
producer-consumer relationship, a predator-
prey relationship, and a parasite-host
relationship within the food web

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.

maybe because its impossible for balloons to lift a whole entire house.