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Droplets of liquid carbon dioxide rise from hydrothermal vents at NW Eifuku volcano. At this pressure (2,300 lbs per square inch) and temperature (2ºC or 36ºF) carbon dioxide is a viscous, sticky liquid, evident in the way that it accumulated on the undersides of the ROPOS remotely operated vehicle. Video courtesy of Submarine Ring of Fire 2004 Exploration, NOAA Vents Program.