Across
- 2. destruction of waste materials by burning
- 5. its pollution that reduces visibility
- 6. species that can signal a change in the biological condition of a particular ecosystem
- 9. moving water that generates electricity
- 13. major component of photochemical smog
- 14. derived from replenishing natural sources
- 15. fertile land becomes desert
- 18. byproduct of wastewater treatment
- 19. used in insulation for pipes, floor tiles, building materials
- 20. bacteria found in the environment, foods, and intestines of people and animals
Down
- 1. water from toilets, showers, baths, kitchen sinks, laundries and industrial processes
- 3. converts organic materials into a nutrient-rich soil
- 4. rapid increase in the density of algae in an aquatic system
- 7. renewable fuel made from corn and other plant materials
- 8. fuels produced from renewable biological sources
- 10. body of water becomes excessively enriched with minerals and nutrients
- 11. waste with properties that make it dangerous
- 12. microscopic solids/ liquid pollutant that can cause health issues
- 16. pollutants that aren’t emitted but formed in atmosphere
- 17. recovery and reprocessing of waste materials for use in new products