Improved ventilation. 73-year-old woman sitting by a fireplace that has been equipped with a metal smoke hood and chimney to improve ventilation. Open wood fires create a lot of soot (on walls) and smoke. This can lead to diseases caused by smoke inhalation. Devices such as ceramic stoves and smoke hoods can reduce such diseases. A metal smoke hood is more expensive than an adobe smoke hood (seen in image M935/294). Photographed in January 2006 in Karombo village, near Kisumu, Kenya. For a room without a smoke hood, see image M935/292.