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Friday, Nov 15, 2013 - 9:30 AM    "Critical Aquifer, Trout in the Classroom, Grizzlies Return, Dragonflies" Underneath the Great Plains, the Ogallala Aquifer holds a vast expanse of prehistoric water reserves, a vital source of moisture and a key asset for America's agricultural economy. But the Ogallala is now threatened by overuse in places like the Texas Panhandle, where farmers and ranchers now work with advisers from the Natural Resources Conservation Service to find ways to maximize their efficiency in irrigation and protect their water for future generations. Students in the Sierras in California help to restore threatened Lahontan cutthroat trout by raising the fish from eggs and releasing them in an approved trout stream; in the process, they learn about the life cycle of the fish, its value as a native species in the local ecosystem, and how invasive fish are crowding it out of its habitat. D
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