然而，垃圾回收最大好处可能是能量的节省与温室气体和污染的降低，当废料当作原料使用时就会产生污染。
But perhaps the most valuable benefit of recycling is the saving in energy and the reduction in greenhouse gases and pollution that result when scrap materials are substituted for virgin feedstock.
加工含油砂会产生高浓度的温室气体，还会产生有毒废料，从而造成环境风险。
Processing tar sands produces a high concentration of greenhouse gasses and can generate toxic waste products that pose an environmental risk.
在一个容纳四千名贝都因人的聚居点中，环境肮脏不已，空气中弥漫着从一座废料厂发出的有毒气体。
Alongside Wadi Naam, a dusty Bedouin camp of 4, 000 people, a toxic waste plant puffs away.
应用推荐