Coming to the UK if Caroline Lucas has her way.
Denmark has built a lot of windpower. Denmark has got a high carbon tax as well as the EU emission trading system and feed-in subsidies for windmills. Some days the wind blows too hard, so the electricity generators have to pay to get rid of the surplus. Fortunately for Denmark, they can export electricity to Norway, that can store it in hydropower dams. The Norwegians can then stop their own production to sell the Danish electricity to their captive customers with a hefty profit. If it blows harder than a gale, the windmills must all suddenly stop in order not to overrev. Then Denmark buys back electricity from Norway for a very high price. Fortunately, Denmark has almost no manufacturing left. Even the windmill manufacturer Vestas Wind has moved most production abroad, because of high manufacturing costs. But Denmark has got one of the biggest public sectors in the world. They are indeed doing well!
Nicked from here