This isn’t really about climate change, just local effects. But yeah, wood fires are super unhealthy.

I have used wood stoves most of my life. If done properly, it’s a sustainable and closed loop method for heating. Occasionally there’s a push against the “unhealthy pollution” of wood stoves, with natural gas selling itself as the clean solution… So there’s that.

A geothermal or large solar system may offer clean/green heating, otherwise wood heat is one of the better natural sustainable ways to provide heat.