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13 votes
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
Please select the best answer from the choices provided
0 ООО
С
D

User Siro
by
5.9k points

2 Answers

5 votes

Answer:

B

Step-by-step explanation:

User Ohgodwhy
by
4.7k points
5 votes

Answer:

releasing emissions from vehicles and industry

User BhavO
by
4.5k points