地理作業1.4~1.6

prevent防止pollution污染effective有效的costly代價高的source能源harmful有害的organism社會coal煤;焦炭point注意single誠實identifiable可認明的smokestack大煙囪;吸煙室industrial工業的figure企劃drainpipe下水道管;排水管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