Which action is NOT part of the best ways to reduce water pollution?

• A. Increase fertilizer use
• B. Prevent runoff
• C. Treat wastewater
• D. Protect wetlands

Answer: (A)

Reducing water pollution relies on limiting the nutrients and contaminants that reach water bodies and on removing or filtering what does reach them. Increasing fertilizer use adds more nitrogen and phosphorus to the environment, which can run off into streams and lakes, fuel excessive algae growth, and consume oxygen in the water. That makes water quality worse rather than better, so it isn’t a strategy for reducing pollution.

In contrast, preventing runoff reduces the amount of polluted water entering waterways, treating wastewater removes contaminants from sewage before it’s released, and protecting wetlands preserves natural filters that trap nutrients and sediments. Together, these actions help lessen pollution and protect water quality.