Across
- 2. methane produced can be used as a fuel and the waste later used as fertilizzer or soil conditioner
- 3. / is a compound used in refrigeration and spray cans that break down ozone. this chemical is very stable and remain in the atmosphere for 100's of years.
- 4. / the measure of the amount of dissolved oxygen required to break down the organic material in a given volume of water
- 6. Fuel / fuels derived from organic matter that has been fossilized (oil).
- 7. / addition of excess nutrients (usually phosphates and nitrates from detergents, fertilizers, swage, etc).to freshwater ecosystem.
- 10. / Organic waste put into anaerobic digesters
- 13. / An excess amount of this nutrient causes eutrophication
- 14. / Adding powdered limestone to neutralize the acid levels in lakes
- 15. is taken to a suitable site and buried there
- 16. / addition to the biosphere of a substance (including heat) by humans, at a rate faster than it can be rendered harmless by the environment... and which seriously affect the health of organisms.
- 20. pollution / secondary air pollution
- 21. / Producing less waste
Down
- 1. / Collecting and separating waste materials and
- 4. Index / a scale (1-10) that gives a measure of the quality of an ecosystem by the presence and abundance of the species living in it.
- 5. / An non-reactive gaseous compound of carbon with bromine and other halogens, used in fire extinguishers known to damage the ozone layer
- 8. them for reuse
- 9. / Burning the waste at high temperatures of up to 2000°C
- 11. Pollution / pollutants emitted directly (chimney, exhaust pipe, etc)
- 12. / A report prepared BEFORE a development project that will change the use of land. (acronym)
- 16. / An excess amount of this nutrient causes eutrophication
- 17. / The main method of disposal
- 18. species / plants and animals that show something about the environment by their presence, absence, abundance or scarcity
- 19. Dioxide / Primary air pollutant that can react with other substances and create acid compounds