AP
Low oxygen levels, coral bleaching getting worse in oceans
Corals and crabs lie dead in Panama. A new study finds oxygen levels in oceans are lower than previously thought.
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Two new studies show that global warming is making oceans sicker, including starving them of oxygen. The researchers say that's making marine life far more vulnerable. A second study says nasty bleaching outbreaks are striking coral reefs four times more often than before as waters warm. The research was published Thursday in the journal Science.
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