I remember back in the 80's in my neighborhood we all burned wood inside, just what the parents did. It was normal, wood smoke was dense at times, yes our cloths smelled of burning wood going to school. During this time indoor wood stoves were not near as efficient as today. I have so many fond memories of sledding and cross country skiing and returning home as a younger child with frozen hands and feet nestling close to the wood stove. Average weekend involved having Friends and cousins over, we all stayed close to the fire all evening enjoying food and watching VHS tapes. Yes this might seem odd for the new generation we were required to keep the fire going and split and stack wood if we were to stay up late. In realty after looking back, we all had our fare share of wood smoke from stoking the fire, or just being outside enjoying the winter activities. Going forward we are all healthy with no issues. We burned wood for so many decades to keep warm, now its bad? Generations before used wood and seem to have no problems from wood smoke.