Environment
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U.S. Border Patrol Tucson Sector Chief Manuel Padilla looks out over the desert terrain in the Buenos Aires National Wildlife Refuge, Wednesday, April 30, 2014, near Sasabe, Ariz. Padilla and other Border Patrol officials spent the day discussing the dangers for people trying to cross the border illegally from Mexico into the U.S., after they enter the remote desert terrain. (AP photo/Brian Skoloff)
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FILE-In this 2001 file photo released by Michigan Technological University, Moose are shown on Isle Royale, Mich. Scientists on Wednesday, April 30, 2014 say the slumping wolf population at Isle Royale National Park is leading to a boom in the number of moose on the Lake Superior island chain. The development reflects what researchers say are dim prospects for the wolves' long-term survival and raises the possibility that a runaway moose population will damage the island's vegetation. (AP Photo/Michigan Tech University, Rolf Peterson, file)
