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after cooling it is compressed and pumped via pipeline to the ocean floor
where it is discharged to the environment. Under the very high pressure
conditions of the sea floor the CO2 would be a liquid, which (due to its
high density and the low rate of water motion down there) would
essentially stay put on the sea floor as a harmless liquid layer. The
waste only had to be actively pressurized to a pressure corresponding to
the level where the CO2 liquified, since below that depth, it would sink
under its own gravity and fall out of the discharge tube on its own. The