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Monthly Archives: December 2019

Maybe you will clean your home many times at one day, you still can smell many bad smells. In fact, no matter how many times you clean, as long as there are people living in the house, these smells will...
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What is water pollution?Water pollution can be caused in many ways, the most serious of which is urban sewage and industrial wastewater discharge. Indirect sources of water pollution include pollutants that enter the water supply from soil or groundwater systems...
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