abstract aged aging alloy ancient backdrop background black blue brown cast corrode corroded corrosion decay degradation dirty enamel environment environmental FeO ferrous grunge grungy iron material metal metallic natural old orange oxidation oxide paint pattern ruin rust rusty scrap scratch scratched sheet speckle spot steel surface surreal texture weathered abandoned agricultural appearances colors colours damage damaged dark derelict deteriorating deterioration Dirt discarded discoloration discolouration disrepair dumped equipment exposed farm farming lines machinery machines neglect neglected rough surfaces textures unwanted variety wearing weathering cogwheels frozen gears red rusted teeth turning aerodynamic alternative blades capture clouds cloudy conservation copy countryside dawn electricity energy generate generator green industry landscape light mast nature power propeller renewable revolve rotate rotation silhouette sky space station sun sunrise sunset sustainable tower tree trees turbine wallpaper weather wind windmill