What was the main cause of sulfur-d

What was the main cause of sulfur-dioxide pollution in Hanoi, according to the article?
why did vietnamese painters use uncommon things in their paintings?

to be from the widespread use of coal cooking fires in Hanoi

เกิดจากการแพร่หลายในการปรุงอาหารจากไฟไหม้ถ่านหินในฮานอย

ผลลัพธ์ (อังกฤษ) 2:

What was the main Cause of sulfur-dioxide pollution in Hanoi, according to the Article?
why did vietnamese Painters use Uncommon Things in their Paintings? to be from the widespread use of Coal Cooking fires in Hanoi due to the ubiquity of the cooking. Burning coal in Hanoi

ผลลัพธ์ (อังกฤษ) 3:

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