Environment

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ADVANCE FOR USE MONDAY, MAY 22, 2017 AND THEREAFTER-A motivational sign is displayed in a classroom window at Forest Grove High School in Forest Grove, Ore., on May 4, 2017. Kimberley Shearer, coordinator for the new Sexual Incident Response Committee at the 6,000-student Forest Grove School District says officials have learned the difference between age-appropriate experimentation and dangerous sexual behavior. Officials may be able to scan social media, but the kids know what’s really going on. (AP Photo/Don Ryan)

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ADVANCE FOR USE MONDAY, MAY 22, 2017 AND THEREAFTER-A hand-painted message is written on a classroom window at Forest Grove High School in Forest Grove, Ore., May 4, 2017. Experts who have treated young sexual offenders stress the value of early intervention, and research cites the importance of a culture that encourages students to report incidents without fear of retaliation and with the expectation that adults will do the right thing. (AP Photo/Don Ryan)

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ADVANCE FOR USE MONDAY, MAY 22, 2017 AND THEREAFTER-Sexual Incident Response Committee members meet at Forest Grove School District headquarters in Forest Grove, Ore., on May 4, 2017. The group meets regularly to discuss more serious sexual incident cases they are monitoring as part of the SIRC program for the school district. The group includes school and district administrators, local law enforcement, juvenile social workers, child protection officials and a psychologist. (AP Photo/Don Ryan)

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ADVANCE FOR USE MONDAY, MAY 22, 2017 AND THEREAFTER-Motivational banners hang in the common area of Forest Grove High School as students head to classes in Forest Grove, Ore., on May 4, 2017. Forest Grove and another Oregon school district were intent on identifying warning signs that students might be contemplating a campus shooting when they stumbled on a threat far more pervasive yet much less discussed _ sexual aggression among classmates. (AP Photo/Don Ryan)

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ADVANCE FOR USE MONDAY, MAY 22, 2017 AND THEREAFTER-Motivational banners hang in the common area of Forest Grove High School as students head to classes in Forest Grove, Ore., on May 4, 2017. Forest Grove and another Oregon school district were intent on identifying warning signs that students might be contemplating a campus shooting when they stumbled on a threat far more pervasive yet much less discussed _ sexual aggression among classmates. (AP Photo/Don Ryan)

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In this image made from video released by Amur Tiger Centre/WWF, a male Amur tiger is seen after being released into the wild in Bikin National Park in southeastern Russia, Monday, May 15, 2017. A Siberian tiger that terrorized Russia's Far East city of Vladivostok by prowling its suburbs has been relocated to a vast, wild Russian national park where officials hope he will thrive. The tiger, nicknamed Vladik, was captured last October on the edge of Vladivostok. He was helicoptered Monday to Bikin National Park, 500 kilometers (350 miles) further north. (Amur Tiger Centre/WWF via AP)

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In this image made from video released by Amur Tiger Centre/WWF, a male Amur tiger is seen before being released into the wild in Bikin National Park in southeastern Russia, Monday, May 15, 2017. A Siberian tiger that terrorized Russia's Far East city of Vladivostok by prowling its suburbs has been relocated to a vast, wild Russian national park where officials hope he will thrive. The tiger, nicknamed Vladik, was captured last October on the edge of Vladivostok. He was helicoptered Monday to Bikin National Park, 500 kilometers (350 miles) further north. (Amur Tiger Centre/WWF via AP)

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A stainless steel falcon sculpture by Hungarian artist Gabor Miklos Szoke is reflected in the glass exterior of Mercedes-Benz Stadium as the retractible roof sits under construction inside the new stadium for the Atlanta Falcons NFL football team in Atlanta, Tuesday, April 25, 2017. At 41.5 feet high and a wingspan of over 64 feet, it's the largest bird sculpture in the world. (AP Photo/David Goldman)

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Several Alaska state representatives gather in front of state House Speaker Bryce Edgmon during a break in a House floor session on Wednesday, May 17, 2017, in Juneau, Alaska. (AP Photo/Becky Bohrer)

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Three-time Super Bowl champion Ed McCaffrey throws a ball during a promotion for the Sydney Cup in Sydney, Australia, Thursday, May 18, 2017. Stanford University and Rice will play the opening game of the college football season in Sydney on Aug. 27. (AP Photo/Rick Rycroft)

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FILE - In this Oct. 26, 2011 file photo, wind turbines line the hillside at First Wind's project in Sheffield, Vt. Regulators in Vermont - a state that has been working toward some of the most renewable energy goals in the country - are seeking a state sound limit on wind power projects that is among the quietest in the country. (AP Photo/Toby Talbot, File)

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FILE - In this Sept. 3, 2008, file photo, an endangered desert tortoise sits in the middle of a road at the proposed location of three BrightSource Energy solar-energy generation complexes in the eastern Mojave Desert near Ivanpah, Calif. Scientists examining the deaths of female desert tortoises near Joshua Tree National Park say it appears the animals died while exhausting their water and energy to lay eggs during California's drought. U.S. Geological Survey biologist Jeffrey Lovich said Tuesday, May 16, 2017, he believes the tortoises died during a desperate attempt to fight extinction. (AP Photo/Reed Saxon, File)

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Roy Costner III and Roy Costner IV, of Pickens County, South Carolina

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In this Feb. 6, 2007 file photo, an Eastern white pine seedling is held in Nebraska City, Neb. A warmer, wetter climate is helping push dozens of Eastern U.S. trees to the north and, surprisingly, west, a new study finds. (AP Photo/Nati Harnik, File)

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In this photo provided by Songlin Fei, Purdue University, taken May 16, 2017, an Eastern white pine tree. Eastern white pine trees in the U.S. have moved more than 80 miles west since the early 1980s, according to a new study. by Songlin Fei of Purdue University. A warmer, wetter climate is helping push dozens of Eastern U.S. trees to the north and, surprisingly, west, a new study finds. (Songlin Fei/Purdue Univesity via AP)

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Ron Bloomberg, who witnessed victim and neighbor Eric Gavin's body being recovered, embraces his girlfriend as he returns to his home in Chetek, Wis., after a tornado flattened a trailer park and nearby trees.(Richard Tsong-Taatarii/Star Tribune via AP)

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Ringling Bros. clowns take a break between acts in "Clown Alley," a private area backstage, Friday, May 5, 2017, in Providence, R.I. Clown Alley is not just a place: the private area backstage where clowns get ready to perform. It’s how the clowns refer to themselves, a mini-fraternity within the circus, and a microcosm of it. (AP Photo/Julie Jacobson)

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A tornado flattened a turkey farm near the trailer park Tuesday, May 16, 2017, in Chetek, Wis., during powerful spring storms that battered an area from the South Plains of Texas to the Great Lakes. (Richard Tsong-Taatarii/Star Tribune via AP)

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A tornado flattened a trailer park and nearby trees in a mobile home park Tuesday, May 16, 2017, in Chetek, Wis., during powerful spring storms that battered an area from the South Plains of Texas to the Great Lakes. (Richard Tsong-Taatarii/Star Tribune via AP)

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A German Shepherd dog guards what remains of what appears to be its owner's home Wednesday, May 17, 2017, in a trailer park that was devastated by a tornado Tuesday during powerful spring storms that battered an area from the South Plains of Texas to the Great Lakes. (Richard Tsong-Taatarii/Star Tribune via AP)