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exchange_fire_towers_55128.jpg

ADVANCE FOR USE SATURDAY, APRIL 1, 2017, AT 3:01 A.M. EDT AND THEREAFTER - In this March 9, 2017, photo, Jack Zborovian, forest fire specialist supervisor for Pennsylvania Department of Conservation and Natural Resources (DCNR), gestures while inside a fire lookout tower in Mehoopany Twp., Pa. (Christopher Dolan/The Citizens' Voice via AP)

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exchange_fire_towers_51834.jpg

ADVANCE FOR USE SATURDAY, APRIL 1, 2017, AT 3:01 A.M. EDT AND THEREAFTER - In this March 9, 2017, photo, Jack Zborovian, forest fire specialist supervisor for Pennsylvania Department of Conservation and Natural Resources (DCNR), gestures while inside a fire lookout tower in Mehoopany Twp., Pa. (Christopher Dolan/The Citizens' Voice via AP)

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exchange_fire_towers_56598.jpg

ADVANCE FOR USE SATURDAY, APRIL 1, 2017, AT 3:01 A.M. EDT AND THEREAFTER - In this March 9, 2017, photo, Jack Zborovian, forest fire specialist supervisor for Pennsylvania Department of Conservation and Natural Resources (DCNR), gestures while inside a fire lookout tower in Mehoopany Twp., Pa. (Christopher Dolan/The Citizens' Voice via AP)

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FOR RELEASE SATURDAY, APRIL 1, 2017, AT 3:01 A.M. EDT.- Erin Kabler, Deputy Wildlife Conservation Officer, holds a black bear cub on March 20, 2017 in Cambria County. The Game Commission tracks female black bears to their dens with radio collars to check their health and tag the ears of their cubs. (Haley Nelson/Pittsburgh Post-Gazette via AP)

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exchange_recycling_mandate_21472.jpg

A sea of electronic waste, consisting mostly of televisions, microwaves, and computers, stacked over six feet high, cover the landscape at Westmoreland Cleanways and Recycling, in Unity, Pa., on Friday, March 24, 2017. Under the state's recycling law, Act 101 of 1988, municipalities with fewer than 5,000 residents are not required to provide at-home, curb-side pickup of recyclables. As a result, only 18 percent of the state's more than 2,500 municipalities are mandated to provide recycling, according to the state Department of Environmental Protection. (Dan Speicher/Pittsburgh Tribune-Review via AP)

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This March 13, 2017 photo shows one ton bales of recycled materials at TC Recycling in Mars, Pa. Some are saying the state's recycling law is in need of updating specifically the threshold that doesn't require recycling for municipalities with less than 5,000 people. (Sidney Davis /Pittsburgh Tribune-Review via AP)

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Zachary Henderson, 20, of Farifield Township, Pa., moves two large boxes of electronic waste via forklift, at Westmoreland Cleanways and Recycling, in Unity, on Friday, March 24, 2017. Under the state's recycling law, Act 101 of 1988, municipalities with fewer than 5,000 residents are not required to provide at-home, curb-side pickup of recyclables.As a result, only 18 percent of the state's more than 2,500 municipalities are mandated to provide recycling, according to the state Department of Environmental Protection. (Dan Speicher/Pittsburgh Tribune-Review via AP)

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exchange_recycling_mandate_12215.jpg

A sea of electronic waste, consisting mostly of televisions, microwaves, and computers, stacked over six feet high, cover the landscape at Westmoreland Cleanways and Recycling, in Unity, Pa., on Friday, March 24, 2017. Under the state's recycling law, Act 101 of 1988, municipalities with fewer than 5,000 residents are not required to provide at-home, curb-side pickup of recyclables. As a result, only 18 percent of the state's more than 2,500 municipalities are mandated to provide recycling, according to the state Department of Environmental Protection. (Dan Speicher/Pittsburgh Tribune-Review via AP)

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exchange_recycling_mandate_24294.jpg

Rob Hebenthal, 21, of Latrobe, Pa., unloads an old computer from a clients car, at Westmoreland Cleanways and Recycling, in Unity, on Friday, March 24, 2017. Under the state's recycling law, Act 101 of 1988, municipalities with fewer than 5,000 residents are not required to provide at-home, curb-side pickup of recyclables. As a result, only 18 percent of the state's more than 2,500 municipalities are mandated to provide recycling, according to the state Department of Environmental Protection. (Dan Speicher/Pittsburgh Tribune-Review via AP)

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Material sorters work at TC Recycling in Mars, Pa., on Monday, March 13, 2017. (Sidney Davis/Pittsburgh Tribune-Review via AP) ** FILE **

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FILE - This Aug.18, 2016, file photo, shows the remains of an oil-extraction operation in Banning Ranch, on what is believed to be the biggest piece of privately-owned vacant land on Southern California's coast in Newport Beach, Calif. California's Supreme Court ruled on Thursday, March 30, 2017, that an upscale coastal city failed to adequately consider the environmental impacts of a plan to build homes on a large swath of land overlooking the Pacific Ocean. The court found that the city of Newport Beach should have considered environmentally sensitive habitat areas when drafting a review of a hotly-contested proposal to develop the 401-acre parcel known as Banning Ranch. (AP Photo/Nick Ut, File)

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FILE - This Aug. 18, 2016, file photo shows Banning Ranch, including what remains of an oil-extraction operation, on what is believed to be the biggest piece of privately-owned vacant land on Southern California's coast in Newport Beach, Calif. California's Supreme Court ruled on Thursday, March 30, 2017, that an upscale coastal city failed to adequately consider the environmental impacts of a plan to build homes on a large swath of land overlooking the Pacific Ocean. The court found that the city of Newport Beach should have considered environmentally sensitive habitat areas when drafting a review of a hotly-contested proposal to develop the 401-acre parcel known as Banning Ranch. (AP Photo/Nick Ut, File)

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FILE - In this Jan. 7, 2014 file photo, divers swim with dozens of West Indian Manatees as the animals congregate around a freshwater spring at the Three Sisters Springs on the Crystal River north of Tampa, Fla. The U.S. Fish and Wildlife Service says the West Indian manatee is now considered “threatened,” not “endangered,” but it also says the gentle giant could be in danger of extinction in the future without continued protections. The agency said in a news release Thursday, March 30, 2017, that challenges remain to ensuring the species’ long-term future, even though the manatee population has increased over the years. (Matthew Beck /The Citris County Chronicle via AP, File)

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In this March 5, 2017 photo, visiting social scientist Melissa Haeffner speaks about global warming and her December trip to Antarctica, at O'Fallon Township High School Milburn campus in O'Fallon, Ill. Haeffner was one of 76 female scientists on the inaugural Homeward Bound expedition to Antarctica, where the women learned leadership skills and how to improve communication among their various fields. Organizers chose Antarctica because of the continent's importance in measuring climate change (Steve Nagy /Belleville News-Democrat, via AP)

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In this March 16, 2017 photo, a potato plant grows inside a Mars simulator in Lima, Peru. “It’s a ‘super potato’ that resists very high carbon dioxide conditions and temperatures that get to freezing,” said Julio Valdivia, an astrobiologist with Peru’s University of Engineering and Technology. (AP Photo/Martin Mejia)

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In this March 16, 2017 photo, a potato plant grows inside a Mars simulator in Lima, Peru. The simulator mimicks the harsh conditions found on Mars. (AP Photo/Martin Mejia)

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In this March 16, 2017 photo, Peruvian scientist David Ramirez points to a potato plant in a simulator akin to a Mars' conditions, in Lima Peru. Sprouting from dry Peruvian desert soil, hope for one day growing food on Mars is emerging in the form of a potato plant. (AP Photo/Martin Mejia)

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Residents of the District of Columbia's Ward 8 say that missing and runaway children have long been a problem in the poor area, but largely ignored before social media. (Associated Press)