| http://www.w3.org/ns/prov#value | - The polar regions, acting as the ???thermostats??? of the Earth, are the source of the cold air current vortices and the cold ocean currents, such as the Humboldt and California current, which affect the ENSO cycle and keep the Earth???s overall temperature in balance, much as the blood stream regulates the body???s temperature and the supply of oxygen.
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