GREEN
05/08/2010 05:12 am ET | Updated May 25, 2011

Oceans Losing Oxygen Is A Sign Of Climate Change

Lower levels of oxygen in the Earth's oceans, particularly off the United States' Pacific Northwest coast, could be another sign of fundamental changes linked to global climate change, scientists say.

They warn that the oceans' complex undersea ecosystems and fragile food chains could be disrupted.

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