Some factors of smoke are characteristic of your combustion supply. Guaiacol and its derivatives are goods of pyrolysis of lignin and so are attribute of Wooden smoke; other markers are syringol and derivates, and also other methoxy phenols. Retene, an item of pyrolysis of conifer trees, is an indicator https://broadfar.com/oraco-global-trends-in-heat-not-burn-products/