In 1986, a Cameroonian lake released a CO2 cloud that killed 1,746 people overnight
by Ellsworth Toohey from Boing Boing on (#76DK5)
On the night of 21 August 1986, Lake Nyos in northwestern Cameroon released between 100,000 and 300,000 tons of carbon dioxide in a single outgassing event. The cloud rose at nearly 100 km/h, then sank - carbon dioxide is 50 percent more dense than air - and moved downvalley at 20 to 50 kilometers per hour. - Read the rest
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