ancient clouds decay decayed derelict flowers meadow mill museum old renewable energy sail sky vane wind wind energy wind mill windmill windmills windy wood wooden grain miller mills Poland polder pump pumping sails traditional alternative cell conservation electricity energy enery environment environmental equipment fuel gas generation global green green energy greenhouse Harness heat nature panel panels power roof solar solar electric solar panel sun block break clear concrete demolish demolition destroy down flatten hydraulic knock mechanical mound pull down raze redevelop redevelopment renewal rubble ruins site skyscraper smash steel topple tower urban walls windows wrecker wrecking