Adults with chronic mental illness account for approximately of the homeless population.

About 30% of people who are chronically homeless have mental health conditions. About 50% have co-occurring substance use problems.

Explanation:

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.

i don't know, but does anyone wanna be friends? i'm doing my homework at 1: 49 in the morning : /