Hydroelectric Power
Hydroelectric is a renewable resource.Advantages are that it makes electric power with a renewable resource, but the disadvantage is that it cost alot of money to build the dam.Anither disadvantage is that it stops sea animals to get to the ocean from their spawning ground. They are only good when it is in a big body of water and will gain water real guick. And they must make room were the fish have area to get threw and that they are able to get to theocean wich cost even more money.