There is considerable scope for medium scale Hydro-power schemes. Germany does it, and we could, using the same kind of sites. The sites used a few centuries ago, to grind cereals, run forges, etc.

They are costly at the moment, but they would become much cheaper if they were more common. The small ponds assciated with this don't displace people, and are positivly good for the enviroment in their own right. Mill ponds are prettier than turbines as well.