windmills at sunset. obidos. portugal

alternative background battery blades clean cloud countryside dark darkness dusk ecologic ecological ecology electric electrical electricity energy engineering environment evening facility farm future generate generated generating generation generator generators grid illustration landscape mill mills modern natural new obidos orange painting park plains pollutant portugal power prairie producing production red renewable resource resources rotate rotating rotor rural safe silhouette silhouetted silhouettes sky solar source sources sunrise sunset supplier supply sustainable system systems tower towers turbine turbines utility wind windmill windmills windpower