Question

which is a nonpoint source of pollution?
tourists throw trash into the ocean.
a car mechanic pours oil on the ground.
rain contains chemicals that seep into the ground.
a pipe dumps waste from a factory into a stream.

Explanation:

Nonpoint source pollution comes from diffuse sources (not a single, identifiable outlet). Rain containing chemicals that seep into the ground is from a diffuse source (rainfall over an area), while the others are point sources (specific actions/locations like tourists’ trash, mechanic’s oil, factory pipe).

Answer:

Rain contains chemicals that seep into the ground.