[speaker001:] Well, no one could survive without water, but you see pollution has been making more and more water unable for drinking.
[speaker002:] Yeah. Water pollution has for a long time been a major concern among the environmental issues.
[speaker001:] But what are the sources of water pollution?
[speaker002:] They could generally be divided into two categories, direct and indirect contaminant sources.
[speaker001:] Well, direct ones are the pollution directly from factories, refineries waste treatment plants etc., aren 't they?
[speaker002:] Yeah. They are emitted directly into urban water supplies.
[speaker001:] But what about the indirect ones?
[speaker002:] Indirect sources include contaminants that enter the water supply from soils or groundwater systems and from the atmosphere via rainwater.
[speaker001:] I see. For the sake of us all, we should be an active participator in the prevention of it.
[speaker002:] Sure. It's an issue asking for everyone's participation.