Question

Air pollution in US and Canadian cities is caused mostly by __________.

A.
clear-cutting forests for timber
B.
releasing emissions from vehicles and industry
C.
dumping runoff from farms into rivers
D.
harvesting minerals from mines
plz hurry

Answer 1

Option B) releasing emissions from vehicles and industry.

Answer 2

Step-by-step explanation:

its B.releasing emissions from vehicles and industry