Multiple choice

Water pollution as a result of fertilizer runoff from farms is harmful because it initially

  1. changes the chemical composition of nearby streams and lakes

  2. adds ozone to the atmosphere, increasing global temperatures

  3. decreases the water temperature of streams and lakes

  4. decreases the amount of nutrient recycling in lakes
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Fertilizer runoff introduces excess nutrients (nitrogen and phosphorus) into water bodies, causing eutrophication, which alters the chemical balance and can lead to algal blooms.

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