Why does generation of hydroelectricity cause no pollution?

1.	Why does generation of hydroelectricity cause no pollution?
Answer» Explanation: Explanation: turbines are MOVEMENT is naturally through the FLOW of WATER and it does not need any technical outside support and it only depends on the flow of water which occurs naturally because the RIVERS and water RESOURCES there is no pollution in hydroelectricity .

Answer»

Explanation:

Explanation: turbines are MOVEMENT is naturally through the FLOW of WATER and it does not need any technical outside support and it only depends on the flow of water which occurs naturally because the RIVERS and water RESOURCES there is no pollution in hydroelectricity .