ลม, พลังงาน, ไฟฟ้า, สิ่งแวดล้อม, การอนุรักษ์, นิเวศวิทยา, ใบพัด, เทคโนโลยี, กังหัน, อำนาจ, ฟาร์ม
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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