why do some cigarettes have holes in the filter

why do some cigarettes have holes in the filter NOVA Online | Search for a Safe Cigarette I asked for a diagram

Name: why do some cigarettes have holes in the filter NOVA Online | Search for a Safe Cigarette I asked for a diagram
Brand: vanierexcavation.com
SKU: 7769949250
Price: 22.98 USD
Availability: InStock
Rating: 4.856800000000001 (6 reviews)

I asked for a diagram of how a cigarette filter works lol What is this dotted line for on the filter? : r Cigarettes What are cigarettes made of? Main ingredients CigsSpot The failed history of tobacco harm reduction Bought this cigarettes on holiday in the UK (Southern England), but they have these really odd filters? : r Cigarettes

SKU: 7769949250 · From vanierexcavation.com

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as well as fine dust, pollen, and fine particles

Lot# 493 Price SOLD: $30 Description Two camel cigarette advertising items to include a vintage thermometer in good original condition, working, 13 1/2 high by 6 wide, along with a 1998 metal advertising sign 11 1/2 high by 17 1/2 wide.