black dots in cigarette filter I took my N30 apart to see what these were. What are they? Mold??? Dust? The new mask is completely white. They don't supply new filters for this mask Cigarette sales at a street

Cigarette sales at a street vendor in Mexico City during World No Tobacco Day in Mexico. This annual observance informs the public about the dangers of tobacco use, the business practices of black dots in cigarette filter WTF is this black stuff in my cigarette filters? : r Whatisthis WTF is this black stuff in my cigarette filters? : r Whatisthis Maximum yields might improve public healthif filter vents were banned: a lesson from the history of vented filters Tobacco Control Black Specks or Carbon Dust in Water: Where Does it Come From? What is this dotted line for on the filter? : r Cigarettes

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