Some parts of smoke are attribute with the combustion resource. Guaiacol and its derivatives are merchandise of pyrolysis of lignin and are attribute of Wooden smoke; other markers are syringol and derivates, and various methoxy phenols. Retene, an item of pyrolysis of conifer trees, is surely an indicator of https://broadfar.com/oraco-global-trends-in-heat-not-burn-products/