Degassing
In 2003, a venting pipe was inserted into the lake, in an effort to prevent the disaster from recurring. Initially a pump was needed to pull water from the bottom, but as carbon dioxide began to come out of solution it created buoyancy in the water in the pipes, allowing the pump to be turned off.
However, a study in September 2005 by George Kling and other researchers at the University of Michigan found that gas was not being removed from the lake quickly enough to ensure that the disaster never happens again. Kling recommended the lowering of the existing pipe and the addition of a new one in order to release more carbon dioxide.
Read more about this topic: Lake Monoun