Question

Farmers in a region notice an increase in algae growth in local ponds after heavy rainfall. What is the likely cause of this phenomenon?

Options

• Pesticide runoff

• Fertilizer runoff

• Soil erosion

• Industrial waste

Answer 1

Fertilizer runoff

Explanation:

Fertilizer runoff is the most likely cause of increased algae growth in local ponds after heavy rainfall. Nitrogen and phosphorus fertilizers wash into bodies of water during rains, leading to excessive algal growth, which can lead to eutrophication and oxygen depletion.