ανεμόμυλος, έρημος, ήλιος, σύννεφα, ουρανός, ανεμογεννήτρια, παραγωγή καυσίμων και ηλεκτρικής ενέργειας, άνεμος, αιολική ενέργεια, ηλεκτρική ενέργεια, γεννήτρια
Public Domain
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