IF THE world cannot curb its carbon dioxide emissions, perhaps the obvious solution is to bury the CO2. But where? Abandoned oil wells, coal seams and salt mines are all possibilities. The safest place, though, might well be down in the ocean bed.
High pressures and low temperatures several hundred metres down in the sediment would ensure the CO2 quickly liquefied or formed frozen lattices with water called hydrates.
Even earthquakes would not shift it, says Kurt House, a geoscientist at Harvard University. Better still, the available storage space is vast. The US could store thousands of…
