Some factors of smoke are characteristic of the combustion supply. Guaiacol and its derivatives are products of pyrolysis of lignin and therefore are attribute of Wooden smoke; other markers are syringol and derivates, along with other methoxy phenols. Retene, a product of pyrolysis of conifer trees, is definitely an https://broadfar.com/oraco-global-trends-in-heat-not-burn-products/