Across
- 2. / an area where garbage is disposed of and buried under layers of soil
- 5. Treatment / application of chemicals, such as chlorine, to disinfect and kill remaining germs
- 7. Mining / a process that involves removing a large amount of soil and rock on the surface in order to access the valuable material
- 11. Ponds / These are large pools where the cyanide
- 13. Treatment / the separation of a mechanical mixture, including removal of suspended solids, rocks, sand, and grit
- 14. / chemicals that come from pesticides
- 15. / releases energy in the form of radiation, which can be harmful
- 16. / surface Material for surface mining
- 18. / Chemicals seep into the ground and later enter a water supply.
- 20. Pan / a large, low-lying area where seawater flows into
- 21. / a process in which soluble parts of a substance are separated out
- 23. Flaring / Waste
- 24. Pit Mining / a process that involves the removal of all materials in a large pit
- 25. Mining / a process that involves the removal of long strips of overburden in areas where the material being mined is concentrated in veins.
- 26. / the liquid waste water from toilets, baths, showers,
- 27. sinks
Down
- 1. / The solid matter that settles at the bottom of a sedimentation tank
- 3. fractions that makeup petroleum oil based on
- 4. / mixes waste water and sludge with large volumes of air
- 6. / an industrial plant that purifies crude substances
- 8. (mixed in with crushed rock) break down in
- 9. in their boiling points
- 10. produced by the refining process, such as methane or natural gas, are released and sometimes set aflame in a process
- 12. Distillation / used to separate different substances
- 13. / chemical mixtures used to destroy pests that can harm crops
- 17. / a by-product of nickel and copper smelting
- 19. Treatment / biological process involving aeration
- 22. Removal / a process that starts with clearcutting and removal of the mountaintop forest, as none of the vegetation can survive this coal extraction process.