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is the contamiatio of water it is common and a worldwide  issue  that can be encountered in all the place .
it becomes veomous undrinkable as a result animals and the whole community  affected .

this issue can caused a lot of deaths such as :

• paludism
• chikungunya
• typhoid fever
• diarrhea 
• dengue 

another issue is that fishes die some could be exctinted .

_ water  becomes more polluted whe  fishes are  rotten 

THE CAUSES

• Industrial waste insecticide and pesticides
• detergents 
• chemicals 
• mercury