Question

why is it challenging to address non-point source pollution? because its only caused by urban pet waste because it comes from multiple sources that are hard to pinpoint because it is visible and easy to pinpoint

Explanation:

• The first option is incorrect as non - point source pollution has multiple causes, not just urban pet waste.
• The third option is incorrect because non - point source pollution is not easy to pinpoint.
• The second option is correct because non - point source pollution originates from multiple, diffuse sources that are difficult to identify precisely.

Answer:

because it comes from multiple sources that are hard to pinpoint