Dead Zones: Why Earth's Waters Are Losing Oxygen

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Times are tough for shrimpers and fishers in the Gulf of Mexico. The animals they rely on for their livelihood are harder to find. Every summer a dead zone-a region of low oxygen-emerges in the waters along the Gulf Coast. Where oxygen is low, fish and other animals cannot survive. The good news is that people can eliminate dead zones by changing agricultural practices and reducing pollution. But if we don't act globally, our waters will slowly suffocate. Can we survive without healthy seas andrivers?