When referring to a distended blood vessel, a doctor may use the term
a. globulin.
b. varicose.
c. syncope.
d. ascites.

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.

c.more precipitation,but only when emission levels.