Nov , 05 2021
People may wonder why there is still a shortage of water because of the large area of water in the world? But in fact, only 3% of the water on the earth's surface is fresh water. In addition, only about 1.2% of them can be obtained and used as drinking water. A study by a professor at Aarhus University in Denmark came to a surprising conclusion. It says that if people continue to do what they are ...
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