Wood-burning fireplaces
Nat King Cole may have sung about ‘Chestnuts Roasting On An Open Fire’ but we’d probably advise against it, indoors anyway. They may not be anything more cozy and comforting than a fire in your home but burning wood and cleaning the ash up afterward can create high levels of particulate pollution and also increase your exposure to the colorless, odorless, tasteless, flammable gas carbon monoxide.
There are some contributing factors that will increase the risk tenfold, like if you have a small, poorly ventilated room. And we know your central heating system is not as romantic, but it’s definitely the safer option.