[stayathomemom]

I remember reading an article in Smithsonian about a lake in Africa which, you might say, “burped” and the released gases killed a lot of people and animals. I don’t remember any details but surely an Internet search could bring up more info.

[Mmogamer]

http://en.wikipedia.org/wiki/Lake_nyos

[beefree]

Lake Nyos, Cameroon: carbon dioxide killed 1700 people in 1986.