News Main Animals Archaeology Dinosaurs Earth History Human Animal Space Tech   Getty Images |   Staying Put Air pollution swirls above the Atlantic Ocean off the west coast of France (bottom right). At top center is the southern part of the United Kingdom, with Ireland to the west. With most of the world's industry and population centered in the Northern Hemisphere, most pollution is produced there too. A belt of air that scientists call the "chemical equator" tends to keep it segregated from the relatively pristine south. | Video: Discovery Earth   « back to article

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