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costly代價高的source能源harmful有害的coal焦炭single誠實identifiable可認明的smokestack大煙囪;吸煙室industrial工業的drainpipe下水道管;排水管exhaust廢棄(排出)pipe管道pesticide殺蟲劑;殺蟲藥runoff逕流;決賽fertilizer肥料disrupt中斷;破裂的nuisance損害entirely完全input...control使...進入控制eliminate排隊output...control使...失去控制rely依賴correspond相適應catalytic觸媒;催化劑toxic有毒的seepage滲;滲出物dispersed被驅散的unsustained未經保證的poverty缺乏insufficient不適當的seriousness嚴重;危險shrinkingly畏縮地;躊躇地erode侵蝕rangeland牧場;放牧地deteriorate惡化atmosphere大氣層glacier冰川collapse崩塌;瓦解coral珊瑚reef暗礁;沙洲extinct滅絕的refugee難民occur被想起shelter庇護所equivalent同等物prematurely過早地;草率地malnutrition營養失調nonfat脫脂的diarrhea痢疾;瀉肚子measle包蟲sanitation衛生設備ditch壕溝respiratory呼吸作用的dung糞便livestock牲畜類tragedy悲劇affluence富裕assumption採取;承擔purer純淨的spurred裝有馬刺的;(鳥)有距的timber木材subsidies補貼ethical倫理的obligation責任;義務inherited繼承的logically論理上planetary今世的ingenuity賢明stewardship經營nurture培育openness公開;率直polarization偏極trade-off交易Chattanooga查塔諾加Tennessee田納西州unemployment失業率diesel由柴油引擎推動的federal同盟的revision修訂grassroots基層的anthropologist人類學者principle根源biodiversity生物多樣性nutrient營養