Across
- 2. The method of providing plants with water from sources other than direct precipitation.
- 3. measures the intensity of sound
- 4. Chemical compounds that form toxic fumes
- 7. Used as an insulator that will cause heart and lung failure if inhaled
- 10. An underground formation that contains groundwater
- 12. granite is what kind of material
- 13. When lakes and slow moving streams contain an abundance of nutrients they are:
- 14. The percentage of the total volume of rock that has spaces
- 15. When air pollution hangs over urban areas and reduces visibility, it is called:
Down
- 1. The accumulation of pollutants at a successive level of the food chain
- 3. Built across rivers to control the river's flow
- 5. types of vehicles with no tailpipe emissions
- 6. Water that is safe to drink
- 8. This kind of pollution causes fatigue, stress, and anxiety
- 9. The percentage of water found in icecaps and glaciers
- 11. designing landscapes that require minimal water use.