καλάμι, γεννήτρια, άνεμος, ωκεανός, ουρανός, παραγωγή καυσίμων και ηλεκτρικής ενέργειας, ανεμογεννήτρια, αιολική ενέργεια, μπλε, περιβάλλον, παροχή ηλεκτρικού ρεύματος
Public Domain
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