Ανατολή ηλίου, ανεμόμυλοι, δέντρα, ανεμογεννήτρια, παραγωγή καυσίμων και ηλεκτρικής ενέργειας, αιολική ενέργεια, γεννήτρια, ηλεκτρική ενέργεια, φύση, η δυση του ηλιου, προπέλα
Public Domain
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