Across
- 6. Another word for farming
- 7. rain made when pollution gets up into the atmosphere and comes down in rain
- 8. revolution a large increase in crop production
- 9. air act federal law designed to control air pollution on a national level
- 11. Water held underground
- 13. all the inhabitants of a particular town, area, or country.
- 16. the draining away of water
- 17. a substance that has a harmful effect on the environment
- 18. protect from harm and destruction
- 19. a colorless unstable toxic gas with a pungent odor
- 20. fog or haze combined with smoke and other atmospheric pollutants.
Down
- 1. gases responsible for greenhouse effect that leads to global warming
- 2. the process of turning water into vapor
- 3. the process by which fertile land becomes desert. (normally during a desert)
- 4. the supply of water to land or crops to help growth, typically by means of channels.
- 5. formed steps in a sloped hill to decrease erosion and runoff
- 10. a substance that pollutes something especially water or the atmosphere.
- 12. materials that are found in the environment
- 14. the total mass of organisms in a given area or volume.
- 15. the movement of material