Health

2. is an inorganic molecule with the chemical formula O3.
3. indicate or show that one is not willing to do something.
9. recoverable materials that are organic in nature, can be recovered through composting and digestion.
10. to bring down to a smaller extent, size, amount, number, etc.
13. nontoxic, nonflammable chemicals containing atoms of carbon, chlorine, fluorine.
15. portion of carbon dioxide in the atmosphere that is produced directly by human activities.
17. is a type of radiation that is produced by the sun and some artificial sources.
18. is the process of converting waste materials into new materials and object.
20. are individual metals and metal compounds that negatively affect people's health.
21. it is the main constituent of natural gas.

1. includes any technique or method of minimizing the input of energy to overall system.
4. is the chemical compound with the formula SO2, a toxic gas with a punget and irritating smells.
5. is the second layer of the atmosphere.
6. high energy particles into the air, water, or earth as a result of human activity.
7. a waste treatment process that involves the combustion of organic substances contained in waste materials.
8. a site for the disposal of waste materials.
11. are microscopic solid or liquid matter suspended in the Earth's atmosphere.
12. group of gases that are composed of nitrogen and oxygen.
14. household
16. is a colorless, odorless, and tasteless gas that is slightly less dense than air.
19. ambient