Across
- 2. gas made up of oxygen above earths atmosphere
- 5. chemicals that kill weeds,bugs,rodents
- 10. materials not able to be treated or recycled
- 11. used materials turned into new products
- 13. naturally occurs in rocks,soil,water,and air
- 14. contaminate environment
- 15. government agency that sets rules and regulations
Down
- 1. maintain natural resources in environment
- 3. found in fish
- 4. process of gathering food scraps and waste
- 6. fog mixed with smoke and chemical fumes
- 7. able to break down without harm thrown away
- 8. substances that have specific characteristics
- 9. level of pollutants in the air
- 12. use in household products before 1978