It is undeniable that the worsening environment has become the biggest concern of the present-day world.Land resources are dwindling because of water loss and soil erosion.Waste gases poison the air we breathe. The rivers and lakes are polluted by waste dumped in them from factories.It is probably no exaggeration to say that deterioration of the quality of the environment threatens the existence of mankind itself.
不可否認的是環(huán)境惡化已成為當(dāng)今世界上人們最擔(dān)心的事了。因為水資源的浪費和土壤被侵蝕，土地資源逐漸縮小。我們呼吸著有毒的空氣，河流和湖泊也被附近的工廠里排放出來的廢棄物嚴重污染了。不夸大其詞地說，環(huán)境質(zhì)量的惡化很可能威脅人類的生存。
