Across
- 2. It can corrode buildings and statues
- 5. Air pollution is caused from burning of a substance
- 6. recycling of used water
- 7. an important resources in our daily lives
- 8. people should switch to environmentary friendly vehicles
- 9. source of water pollution
- 13. packaging of product to reduce the amount of waste to be burnt
- 14. to prevent public and Industries from polluting water ways
- 17. treatment of used water to filter out larger solids and bacteria
- 19. plastic ,rubber and metal containers which are thrown in water bodies
- 21. What is produced during forest fires
Down
- 1. what is produced by combustion processes
- 3. incomplete burning of fossil fuels
- 4. remove salt from sea water into drinking water
- 10. oil spills are often caused between ships and oil tankers
- 11. Living things need this to survive
- 12. this can harm aquatic animals and plants
- 15. Our Environment is made of a layer of air
- 16. Many human activities affect the quality of air
- 18. A mixture of nitrogen ,oxygen and carbon dioxide
- 20. a mixture of pollutants