This is similar to smoking tobacco products and the second hand smoke from them. There are the same byproducts of burning tobacco when burning wood. Heterocyclic amines and benzopyrene are two. https://www.theguardian.com/environment/2024/jan/26/domestic-wood-burners-having-a-deadly-impact-in-outside-areas?utm_term=65bb88efb89deac9b015f82bd2680cc4&utm_campaign=DownToEarth&utm_source=esp&utm_medium=Email&CMP=greenlight_email Information about benzopyrene https://en.m.wikipedia.org/wiki/Benzopyrene
