I do not underststad, how wood/natural smoke felt less irritating to me and to my near ones than petroleum smoke. May there be a difference due to natutural and unnatural. Measns, our body is more capable to deal with wood smoke due to its nature.Wood is a very inefficient fuel, and pollutes far more than petroleum. That's why a wood fire has a black plume - as well as leaving solid ash, whereas petroleum can be burned efficiently enough to have no partially-consumed byproducts - just gases: CO2 and water vapour.
Kumar, why do you wish to poison our planet?