英语实用口语之环境污染

英语自学网

　　Well,no one could survive without water.But you see pollution has been
making more and more water unable for drinking.
        　　Yeah.Water pollution has for a long time been a major concern among the
environmental issues.
        　　But what are the sources of water pollution?
        　　They could generally be divided into two categories: direct and indirect
contaminant sources.
        　　Well,direct ones are pollution directly from factories,refineries,waste
treatment plants etc.,aren't they?
        　　Yeah.They are emitted directly into urban water supplies.
        　　But what about the indirect ones?
        　　Indirect sources include contaminants that enter the water supply from
soils or groundwater systems and from the atmosphere via rainwater.
        　　I see.for the sake of us all,we should be an active participator in the
prevention of it.
        　　Sure.it's an issue asking for everyone's participation.