In addition to regulating temperatures, the deep ocean current called the global conveyor belt moves nutrients up from deep waters to nourish seaweed and algae that support many forms of life. Although some surface currents move at a rate of hundreds of centimeters per second, this plodding current creeps at only a few centimeters per second. It's slow but steady with a flow 100 times greater than that of the Amazon River [source: NOAA: Currents].
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