Question: Hi webmaster, I have a question about gas logs. Will they produce the same amount of smoke and particulates matter or less than burning wood logs? And if they produce less, will it make a great difference? Answer: Most gas logs will produce quite a bit less in terms of smoke and particulates. There will be no visible smoke coming out the chimney and any buildup in the chimney is unlikely. Gas is a cleaner fuel than wood, although wood can be burned clean with the proper technology (i.e. the new stoves).