environmentprotection环境保护;reclaim开垦;
deforestation;滥砍滥伐over-fishing过渡捕鱼;
ozonelayer臭氧层;deterioration恶化;
pollution污染;recycle回收再利用;
circulation流通,循环;purify净化;
dust-storm沙尘暴;acidrain酸雨;
greenhouseeffects温室效应;globalwarming全球变暖;
rare稀有的;sensitivetoclimate;对气候敏感的;
endangeredspecies濒危物种;wipeout清除,消亡;
extinction灭绝;conservation保护,保存;