Question

which of these is an example of point-source pollution?

a. light pollution comes from cities across america.

b. exhaust is emitted from vehicles in a city.

c. fertilizer and pesticides flow into rivers from farms.

d. noise pollution comes from a jet engine.

Explanation:

Point - source pollution is pollution that comes from a single, identifiable source.

• Option A: Light pollution from cities across America comes from multiple, widespread sources, not a single point.
• Option B: Exhaust from vehicles in a city comes from many different vehicles, so it is non - point source pollution.
• Option C: Fertilizer and pesticides from farms flowing into rivers come from a large area (farms) and multiple sources within the farms, so it is non - point source pollution.
• Option D: Noise pollution from a jet engine comes from a single, identifiable source (the jet engine), so it is an example of point - source pollution.

Answer:

D. Noise pollution comes from a jet engine.