kavin submitted, created time 8 months 5 days (www.msnbc.msn.com)

Recently, a new study warns that low-oxygen zones where sea life is threatened or cannot survive are growing as the oceans are heated by global warming. Oxygen-depleted zones in the central and eastern equatorial Atlantic and equatorial Pacific oceans appear to have expanded over the last 50 years. Low-oxygen "dead zones" in the Gulf of Mexico and other areas also have been studied in recent years, raising concerns about the threat to sea life.

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