Answer:
water pollution, the release of substances into subsurface groundwater or into lakes, streams, rivers, estuaries, and oceans to the point where the substances interfere with beneficial use of the water or with the natural functioning of ecosystems. in addition to the release of substances, such as chemicals or microorganisms, water pollution may also include the release of energy, in the form of radioactivity or heat, into bodies of water
1. Industrial Waste
2. Marine Dumping
3. Sewage and Wastewater
4. Oil Leaks and Spills
5 Agriculture