Despite promises to fix it, the Gulf's dead zone is growing

Every late spring, it forms 12 miles off the Louisiana coast and lasts for months: a sprawling, lifeless band of water known as the "dead zone."

Shrimp trawlers steer clear, knowing the low oxygen in this part of the Gulf of Mexico makes it uninhabitable for fish and other marine life. It starts at the mouth of the Mississippi River and can extend all the way to the Texas border, many years growing to the size of Connecticut.

It's not a natural phenomenon. Waste water and fertilizer runoff from farms and towns hundreds of miles up the Mississippi pour billions of pounds of excess nutrients into the Gulf, sparking unnatural algae blooms that choke off the oxygen needed for the food chain to survive.

Under a process that's been in place for the past decade, a federal task force and a team of scientists appointed by the federal Environmental Protection Agency will meet in New Orleans this week to tackle the problem.

But more than five years after the task force pledged to reduce the dead zone to a quarter of its size by 2015, it's still getting bigger. A boom in corn production for ethanol is bringing more farmland on line, leading experts to predict near-record sizes this year.

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