Wood smoke is actually pretty bad for your lungs. It's a known carcinogen, although not quite as bad as coal: https://erj.ersjournals.com/content/40/5/1228 htt

Wood smoke is actually pretty bad for your lungs. It's a known carcinogen, although not quite as bad as coal: https://erj.ersjournals.com/content/40/5/1228 https://erj.ersjournals.com/content/40/5/1228