พลังงาน, สิ่งแวดล้อม, ไฟ, ฟืน, การป่าไม้, อุตสาหกรรม, กอง, วัตถุดิบ, การรีไซเคิล, ต้นไม้, เนื้อไม้
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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