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