The absolute threshold for human vision is the ability to see a candle from miles away on a dark night.

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.

a chair, a bed, and a toothbrush

explanation:

i was told this before by a teacher, so yeah