โลก, earthour, เวลาโลก, เวลา, นาฬิกา, ดู, สี, ดาวเคราะห์, ทั่วโลก, สิ่งแวดล้อม, จักรวาล
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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