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July 4, 2010 12:01 AM

It's not just BP's oil in the Gulf that threatens world's oceans

A sobering new report warns that the oceans face a "fundamental and irreversible ecological transformation" not seen in millions of years as greenhouse gases and climate change already have affected temperature, acidity, sea and oxygen levels, the food chain and possibly major currents that could alter global weather. The report, in Science magazine, brings together dozens of studies that collectively paint a dismal picture of deteriorating ocean health.

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