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Archive - Mar 22, 2010

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Ocean pollution. Sea "dead zones", oxygen-deprived, fishless: 1st recorded in 1970, 417 in 2008, largest covers 70,000 sq km

ocean deadzones concentrated mainly around coasts of industrialized countries, causing widespread killing of fish & other marine organisms
A new global study of Earth’s oceans shows a rapid rise in the number of “dead zones” - areas of seafloor with too little oxygen to sustain most marine life. The oxygen-starved waters have proliferated since the 1960s and now rank as one of the world's most pressing environmental problems.
largest ocean deadzone in Gulf of Mexico from Mississippi River delta
Clocking in at over 8000 square miles (21,000 km2) this year, probably the largest dead zone today stems from the Mississippi River delta in the Gulf of Mexico. This is a site at the confluence of significant farming in the midwest and significant fishing (and shrimping) in the Gulf area. The dead zone spans east to west along the Louisiana and Texas coasts.
Expanding dead zones in the oceans: Mississippi Delta, Yangtze River, and Pearl River
Several visible sites with expanding dead zones. Mississippi Delta at the top, with Yangtze River in the bottom left and Pearl River in the bottom right. The dead zones are the tinted clouds swirling at the coastal edge.
Map of ever-rising, now 400+ dead zones in world’s oceans. Their murky waters generate blackholes - no fish, no birds read more »

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