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Water pollution in Africa is serious. More than half of the river water has too much garbage, which will affect health if it is consumed by people. The purpose of river cleaning is to remove excessive rubbish and maintain the environment without human control. When the internal capacity is insufficient, the shell will be illuminated to remind you.
Deng Lin Xu,
Chiao Hsin Shiao,
National Yunlin University of Science and Technology
Fang Yu Chang,