มลพิษ, อากาศ, ภาวะโลกร้อน, ควัน, เป็นพิษ, ด้านอุตสาหกรรม, โรงงาน, สิ่งแวดล้อม
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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