contaminate 污染 [例] The department of Resources notified the town council that the water supply was contaminated.
2. pollute 污染 [例] Rivers in the neighborhood were polluted by the chemical wastes from the factories.
3. taint 感染 [例] The meat was tainted.
4. purify 使純凈 [例] This salt has been purified for use in medicine.
5. pollutant 污染物質(zhì)
6. ecosystem 生態(tài)系統(tǒng)
7. noxious 有害的 [例] The room is full of noxious fumes.
8. toxic 有毒的
9. lethal 致命的
10. venomous 有毒的 分泌毒液的 [例] The government announced that fruits produced in the region was contaminated and thus all the fruits become venomous.
11. deteriorate 使惡化 [例] The water in the catchment has deteriorated in the last month.
12. pernicious 有害的
13. decibel 分貝
14. hazardous 危險地
15. effluent 流出物 [例] Dangerous effluent from some chemical plants is being poured into the river through the town.
16. emission 散發(fā)
17. inorganic 無生物的
18. litter 垃圾
19. nuisance 令人討厭的東西
20. radioactive 放射性的
21. sewage 下水道
22. conservation 保護 [例] There is a need for the conservation of trees， or there will soon be no forests.
23. renewable 能再生的 [例] We could better protect our environment through discovering and using renewable energy.

雅思關(guān)于污染的口語話題