Pollution that contaminates rivers, lakes, and oceans originates from factories, farms, and cities. Which term describes this pollution?

• A. Air Pollution
• B. Pollution in Waterways / Watersheds
• C. Soil Contamination
• D. Ocean Pollution

Answer: (B)

When pollution ends up in rivers, lakes, and oceans and it comes from activities on land—factories, farms, and cities—the best way to describe it is pollution in waterways or within watersheds. The idea is that pollutants originate on the land and are carried by runoff, groundwater, and streams into the network of connected water bodies. A watershed is the land area that drains into a common body of water, so pollutants from anywhere in that area can end up contaminating the rivers, lakes, and ultimately the oceans downstream. This term fit because it covers both the water bodies and the land area feeding them, capturing how contamination travels through the landscape into waterways. In contrast, air pollution targets the atmosphere, soil contamination focuses on the ground itself, and ocean pollution describes issues at the ocean level, not the whole system including rivers and lakes. The concept also aligns with nonpoint source pollution, where many diffuse sources across the watershed contribute to waterway contamination rather than a single discharge.