αιολική ενέργεια, ουρανός, σύννεφα, pinwheel, εργοστάσιο ηλεκτρισμού, παραγωγή καυσίμων και ηλεκτρικής ενέργειας, ανεμογεννήτρια, γεννήτρια, νερό, προπέλα, μπλε
Public Domain
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