Across
- 5. Soil erosion causes soil particles to be carried into waterways
- 6. diffuse contamination of water or air that does not originate from a single discrete source
- 7. Sag the reduction in dissolved oxygen, plotted over a distance along a water body from a point at which sewage or other pollutants have been discharged.
- 10. Water containing human wastes
- 11. a lake low in nutrients
- 12. a single identifiable localised source of pollution
- 14. a rapid growth of microscopic algae or cyanobacteria in water, often resulting in a colored scum on the surface
- 15. water that has been used in the home, in a business, or as part of an industrial process.
Down
- 1. Thermal power generation, released heated water into river systems
- 2. areas of water bodies where aquatic life cannot survive because of low oxygen levels
- 3. Disease-causing bacteria
- 4. Third largest source of water pollution
- 8. excessive richness of nutrients in a lake or other body of water, frequently due to runoff from the land, which causes a dense growth of plant life and death of animal life from lack of oxygen
- 9. any change in water quality that can harm living organisms or make the water unfit for human uses
- 13. Lasts 1,000 years , ends up in rivers , lakes and oceans