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Furthermore, it became clear that increasing the polyethylene glycol concentration causes porosity to increase, while porosity decreases with raising the concentration of cellulose acetate and decreasing the water bath temperature 72

In 2009, the FDA found that e-cigarette cartridges from two leading brands contained detectable levels of known carcinogens and toxic chemicals, including diethylene glycol (commonly found in antifreeze) and nitrosamines

The letter and article also cite this 2015 State Department report about how criminal organizations traffic tobacco

All day, all night, I carry on my back embedded in my flesh, two rows of little white cocoons, so neatly stacked they look like eggs in a crate