Multiple choice

What is pollution that cannot be traced back to a specific source?

  1. nonpoint-source pollution

  2. runoff

  3. point-source pollution

  4. sewage

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Nonpoint-source pollution comes from many diffuse sources, such as rainfall or snowmelt moving over the ground and picking up pollutants, making it difficult to trace to a single origin.