TIL about limnic eruptions, a type of natural hazard in which dissolved CO2 erupts from deep lake waters forming a gas cloud capable of asphyxiating everything in its path.
TIL about limnic eruptions, a type of natural hazard in which dissolved CO2 erupts from deep lake waters forming a gas cloud capable of asphyxiating everything in its path.

en.wikipedia.org
Limnic eruption - Wikipedia

This happened twice in the 80s in Africa killing around 1700 people.