The Strangest Disaster of the 20th Century.

A recounting of the Lake Nyos CO2 eruption in Camaroon.

There is a physical limit to how much CO2 water can absorb, even under the tremendous pressured that exist at the bottom of a 690 foot deep lake. As the bottom layers become saturated, the CO2 is pushed up to where the pressure is low enough for it to start coming out of solution. At this point any little disturbance—a landslide, stormy weather, or even high winds or just a cold snap—can cause the CO2 to begin bubbling to the surface. And when the bubbles start rising, they can cause a siphoning or “chimney” effect, triggering a chain reaction that in one giant upheaval can cause the lake to disgorge CO2 that has been accumulating in the lake for decades.