this maybe a complete no no lets say heat issues are not an issue would lighting a candle create more co2 or would it pollute the air obvioulsly as long as its supervised just a thought about it after i saw threads on co2
if you read teh tread on co2 it say to spend 15 mins breathing 2 times a day to give optimum co2 in like a 9x9 room FIRE BAD