21st century will be the century of water. According to the survey of the whole world, nowadays, there are 1.4 billion people who are lacking in clean drinking water, that is, One in each 5 person is lack of it. Maybe near one third of the population of the world is harmful in this in 2025. More than 40 countries or distances are involved besides China. desalting the seawater is promisingly to solve this question.
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