Across
- 4. It is the second layer of the atmosphere , about 20 % of the atmosphere's mass
- 5. Are microscopic solid or liquid matter suspended in the Earth's atmosphere.
- 6. includes a range of health damaging pollutants such as fine particles and carbon monoxide. In poorly ventilated dwellings, smoke in and around the home can exceed acceptable levels for fine particles 100-fold.
- 7. is a colorless , odorless and tasteless gas that is slightly less dense air
- 10. These are metals that are harmful for people's health
- 12. It is a type of radiation that is produced by the sun and some artificial sources.
- 15. are the Recoverable materials that are organic in nature, such as plant material, food scraps, and paper products
- 21. Is a waste treatment process that involves the combustion of organic substances contained in waste materials
- 23. it is a carbon dioxide is that portion of carbon dioxide in the atmosphere that is produced directly by human activities
- 25. Is a site for the disposal of waste materials by burial and the oldest form of waste treatment
- 26. Is a chemical compund with the chemical formula CH4
- 27. Is an inorganic molecule with the chemical formula O 3.
- 28. Atoxic gas with a pungent ,irritating smell
- 29. it is the process of bringing down an object to a smaller extent
- 30. a substance that pollutes something, especially water or the atmosphere.
Down
- 1. is a single, identifiable source of pollution
- 2. can be released from natural ways or human action.
- 3. Items or material discarded or rejected as useless or worthless;
- 8. can be discharged into the surrounding waters during certain rain
- 9. is the enrichment of a water body with nutrients, usually with an excess amount of nutrients
- 11. are those that are not directly emitted from a source but form when primary pollutants react chemically in the atmosphere.
- 13. These are the major contributors to the indoor air pollution.
- 14. Is the process of converting waste materials into new materials and objects
- 16. Are non toxic nonflammable chemicals ,containing atoms of carbon chlorine and fluorine.
- 17. substances or high-energy particles into the air, water, or earth as a result of human activity, either by accident or by design.
- 18. are organic compounds that are resistant to environmental degradation through chemical, biological, and photolytic processes.
- 19. pollution and refer to those inputs and impacts which occur over a wide area and are not easily attributed to a single source.
- 20. Are a group of gases that are composedof nitrogen and oxygen
- 22. these includes any technique or method of minimizing the input of energy to an overall system by the exchange of energy from one sub-system of the overall system with another
- 24. it is made up of chemical particles. When smoke or other pollutants enter the air, the particles found in the pollution mix with the air.