Conditioning involves passing the tobacco through a humidity chamber where steam or conditioned air is used to bring the moisture content of the leaf to the precise level required for the next processing stage
Many people report headaches after vaping, which are generally mild to moderate and may last several hours
Sci Rep 5:110 Yousefi M, Kermani M, Farzadkia M, Godini K, Torkashvand J (2021a) Challenges on the recycling of cigarette butts
Compared to conventional cigarettes, similar substances with potential carcinogenic or toxic effects are found in aerosol from electronic cigarettes, but in lower concentrations, whereas emitted reactive oxygen radicals appear comparable [24]
When filters sit outdoors, rainwater can leach some of these residues into soil or water