Water

 Water,an important element of the human environment.lt is essential for human life.It can be polluted in many ways.First of all farmers use chemical fertilizers to gorw more food.The rain wash away chemical and it mixed with river water, canals water, ponds water.Secondly  steamers ,motor lunchches  and even soil boats can pollute water by throwing oil and human weast in the river . Clean water is essential and safe for our health. 

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