Of all the things we eatand drink, water is the most important. We can live without food for many days,but two or three days without water, usually makes people die. However, not allof people understand this. They keep throwing rubbish into the rivers or lakes. Some factories even pour waste water into the river. As a result, many riversand lakes have become so dirty that the water is no longer safe for people todrink . Let’s do our best to keep the water clean to save ourselves .
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