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From: National Science Foundation Update <nsf-update@xxxxxxx>
Date: Thu, 8 Oct 2009 14:08:06 -0500 (CDT)
Subject: Dead Zones
The Earth currently has more than 400 "dead zones"--marine expanses covering hundreds, or even thousands, of square miles that periodically become virtually lifeless. Explore the surprising causes of Oregon's dead zones, and the pioneering methods used to research them.
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