Sea changes

Carbon dioxide is making the oceans more acidic

By Stephen Ornes, 13:58 PM April 7, 2011

Blue patches indicate parts of the ocean that are more acidic than the yellow and red areas. Stars show coral reefs, which can lose their skeletons in more acidic water.

Every day, the ocean absorbs about 22 million tons of carbon dioxide, which is about the weight of 15 million hybrid automobiles. Just as you can't see the carbon dioxide that comes out of your own body each time you exhale, you can't see the gas as it dissolves into the seas.

Space isn't an issue, considering that the oceans cover 72 percent of the planet, but there is a problem brewing beneath the waves. Carbon dioxide in the air helps insulate our planet and keep it warm. But there can...

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