How does hydro electric generate electricity?

There is a dam in a lake or a reservoir, the water in the lake or reservoir goes in the dam, the dam has a spinning turbine, water goes through the turbine and the generater produces electricity.


Is it renewable or non-renewable?

Hydro electric is a renewable energy,water won't run out, the world has the same amount of water all along.


How does it affect the environment?


By building a dam the nearby area will be flooded and this will affect the many habitats of animals and some humans.

Advantages

When the electricity is generated, no greenhouse gases are made.

Hydro-electricity is a renewable energy source.

The water usage is free.




Disadvantages


The dams are really expensive to build.

Building a dam, the nearby area has to be flooded and this could affect wildlife and many plants.

If it does not rain, we may not have enough water to turn the turbines.