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River Pollution
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Clean and Polluted Rivers

The water quality of the rivers has changed over time. Many rivers around the world have been polluted by human activity. While many of these systems remain polluted, many others have also improved. This improvement was, in part, caused by the constructions of sewage treatment plants by local governments and efforts to educate the public about river water quality. Let's see some examples in photographs.

 Polluted rivers

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 Clean rivers

kakita river

 Rivers where the water quality has improved

Water usage in the average U.S., Japanese and Thai home and the quantity and ratio of polluted materials generated.

It is important to think about the substances that cause river pollution. How much water is used at home and what is it used for? How much pollution is contained in waste water leaving your home? Let's see the graphs.

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