Norwegian energy group Norsk Hydro plans to develop a prototype floating windmill that can be placed out at sea. Windmills have sometimes been unpopular because some people think of them as eyesores. By placing a windmill far from land, they will be out of site, but the installation costs will be much more than land based windmills. The higher installation costs should be offset by higher production once built, due to stronger winds at sea. Each 80m tall windmill would produce enough electricity for 1,000 typical Norwegian homes.