Keywords

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

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.