Question

which sentence describes air pollution?

a. all the trees in a forest are cut down and removed, and no new trees are planted.

b. an audience watches a documentary film about the threat of global warming.

c. an old car is dumped into a local stream, where it sits and rusts.

d. soot and dust is released into the air from the smokestack of a power plant.

Explanation:

• Option A describes deforestation, not air pollution.
• Option B is about watching a documentary on global warming, not air pollution.
• Option C describes water pollution (dumping a car in a stream).
• Option D involves releasing soot and dust into the air from a power plant's smokestack, which is air pollution.

Answer:

D. Soot and dust is released into the air from the smokestack of a power plant.