Critical aquifer underneath the Great Plains Farmers and ranchers work with NRCS advisers to find ways to conserve the Ogallala Aquifer, a vast expanse of prehistoric water now threatened by overuse Trout in the classroom 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 stream Yellowstone grizzlies achieve dramatic recovery While the need for continued listing under the Endangered Species Act is still debated, grizzly bears have multiplied under federal protection since 1975, re-occupying areas where they had been absent for decades