Green Tide
Mysterious matter threatens one of the world's most important ecosystems
Just as the sun was reaching its highest point in the sky, Lou Greenwell realized he could see again.
During a morning spent paddling across Blackwater Sound just off Key Largo, Greenwell, 70 years old, had begun to wonder if there was any end to the shadowy mass that stretched in every direction across the once-transparent waters. Then, in the shallows on the sound's far west side, little sand sharks appeared below the suddenly clear surface. ...
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