1. Nowadays, there/several types/pollution.Water pollution/most serious.
2. Water pollution/the contamination/bodies/water/lakes,rivers,oceans/underwater.
3.There/many causes/lead/water pollution/industrial waste,herbicides/pesticides.
4. These causes/lead/so many effects/out break/cholera/other illness.
5. For these reasons,we/need/prevent/water pollution/protect environment.
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