Some elements of smoke are characteristic from the combustion supply. Guaiacol and its derivatives are products of pyrolysis of lignin and so are characteristic of wood smoke; other markers are syringol and derivates, as well as other methoxy phenols. Retene, a product of pyrolysis of conifer trees, is undoubtedly https://broadfar.com/oraco-pioneering-a-smokeless-future-with-innovative-nicotine-delivery/