Photo of a woman sitting in front of a wood stove warming her hands by the fire.
Heart and Circulatory System, Lungs, Prevention

Wood burning produces a complex chemical mixture of fine particulate matter (PM2.5) and gases, which can be breathed deep into the lungs. The specific contents vary based on the type of stove and the type of fuel, but chemicals can include carbon monoxide, oxides of nitrogen and a range of volatile organic compounds, such as cancer-causing formaldehyde and benzene.