Also, you wouldn't want to lose the ability to detect excess CO2 because there are situations where you get a CO2 build up without a significant drop of oxygen levels ( too many people in an enclosed place, dissolved CO2 in a lake suddenly coming out of solution ( see Limnic eruption ), etc . ).
32.
Limnic eruptions ( also called " lake over turns " ) are due to volcanic interaction with the water at the bottom of the lake that has high gas concentrations, this leads to heating of the lake and this rapid rise in temperature would spark a methane explosion displacing a large amount of water, followed nearly simultaneously by a release of carbon dioxide.
33.
The accumulation of dissolved carbon dioxide in three meromictic lakes in Africa ( Lake Nyos and Lake Monoun in Cameroon and Lake Kivu in Rwanda ) is potentially dangerous because if one of these lakes is triggered into limnic eruption, a very large quantity of carbon dioxide can quickly leave the lake and displace the oxygen needed for life by people and animals in the surrounding area.
34.
"Colymboides ", the oldest unequivocal gaviiform genus known as of 2009, is widely known from early Priabonian about 37 million years ago ( Ma ) in the Late Eocene to Early Miocene ( late Burdigalian, less than 20 Ma ) limnic and crown genus " Gavia ", nearly ten prehistoric species have been named to date, and about as many undescribed ones await further study.
