Renewable and Plentiful

what percentage of electricity in the us is from hydro power?

Around 7% of our electricity is from hydro power.

Two Advantages and Two Disadvantages

Advantages: Its cheap and it doesn't pollute.

Disadvantages: Most rivers are all ready dammed and it has a bad effect on animals living near the hydro power plant.

What are the top 3 states that produce hydro power?

A Great Way To Power Your Homes

How was hydro power used many years ago?

Water turned a wooden paddle.
Energy 101: Hydropower