@dg

Water polltuion is one of some problems that our world have to deal. In Vietnam, it is hard to improve the water clean because of people throw bagages in the wrong places including some rivers or some lakes. Longer and longer, those rubbish decomposed and make some bad smells. And the water became polluted by rubbish that people have thrown before. They are some people who do not have good sense. But some people are oppostie from that. They usually scavenge rubbish and keep the environment green. They are doing some works to help our world more green, so we have to do like them to keep the Earth clean and clean by day by day. And also we can keep the water less polluted.