Chah or Cha is a village in Northwest Province of Cameroon that was abandoned after the death of its inhabitants in 2005. The cause has been attributed to an eruption of carbon dioxide from nearby Lake Nyos.
A recurrence is believed to be possible, even likely, and there are additional concerns about the stability of the natural rock wall that holds back the lake water.
The area is reported as being highly fertile and for this reason, there are pressures to resettle the area, despite the great natural risks.
References
Chah (Cameroon) Wikipedia(Text) CC BY-SA