Question

what potential harm can warm stormwater runoff from heat islands cause? it harms water quality in nearby areas. it enhances most aquatic ecosystems. it has little environmental impact. it improves water quality in streams.

Explanation:

Heat islands, which are urban areas with higher temperatures due to human activities like concrete and asphalt, produce warm stormwater runoff. This runoff can carry pollutants (from roads, rooftops etc.) and the heat itself. Higher water temperatures can reduce oxygen levels in water bodies (as warmer water holds less oxygen), harm aquatic life. Also, the pollutants in the runoff degrade water quality. Options like enhancing aquatic ecosystems (they harm instead), having little environmental impact (false as there are impacts), improving water quality (opposite is true) are incorrect.

Answer:

It harms water quality in nearby areas.