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Delta:A place where sediment carried downstream by a river enters the sea, forming a fan of sand or mud.Although deltas make up just 1 percent of the world's land, they're home to more than half a bil...
How do predators contribute to reducing crop losses in agricultural ecosystems? By consuming crop-eating insects and rodents, according to Catherine Lindell of Michigan State University.Lindell is one...
To better understand the properties of the chemical that contaminated the drinking water of about 300,000 West Virginia residents earlier this month and the plumbing and water-treatment systems surrou...
The region between the top of the forest canopy and the base of weathered rock: our living environment and Earth's critical zone.

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