Environment

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First officer Jukka Alhoke sits at the controls of the Finnish icebreaker MSV Nordica as it sets sail off the coast of Canada toward the Bering Strait, Thursday, July 6, 2017. The MSV Nordica is setting course to traverse the Northwest Passage, a route once considered impassible, from the Pacific ocean to the Atlantic via the Arctic. The icebreaker, which is returning to its home port of Helsinki, is carrying researchers studying the impact of the Arctic's melting sea ice on the fragile social and ecological balance in the region, and observers from the U.S. and Canadian Coast Guards. (AP Photo/David Goldman)

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Sandbags arev ready to be deployed on La Fox River Drive in Algonquin, Ill., Thursday, July 20, 2017. Flood levels along two northern Illinois rivers looked to be falling after flooding this week but another round of rain has them rising again. (Rick West /Daily Herald via AP)

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People gather around a partially destroyed mosque after an earthquake on the island of Kos, Greece Friday, July 21, 2017. A powerful earthquake sent a building crashing down on tourists at a bar on the Greek holiday island of Kos and struck panic on the nearby shores of Turkey early Friday, killing two people and injuring some 200 people. (AP Photo/Nikiforos Pittaras)

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A damaged structure sits on the ground after an earthquake in Kos on the island of Kos, Greece Friday, July 21, 2017. Greek authorities said the two tourists who were killed in that house in the overnight quake are from Turkey and Sweden.(AP Photo/Michael Probst)

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Police officers stand in fron of a partially collapsed mosque after an earthquake in Kos on the island of Kos, Greece Friday, July 21, 2017. Greek authorities said the two tourists who were killed in that house in the overnight quake are from Turkey and Sweden.(AP Photo/Michael Probst)

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Passengers gather outside the airport after the cancelation of many flights on the Greek island of Kos on Friday, July 21, 2017. A powerful earthquake sent a building crashing down on tourists at a bar on the Greek holiday island of Kos and struck panic on the nearby shores of Turkey early Friday, killing two people and injuring some 200 people. (Nikos Christofakis/InTime News via AP)

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Rubble sit outside a bar where two people have been killed after an earthquake in Kos on the island of Kos, Greece Friday, July 21, 2017. Greek authorities said two tourists killed in the overnight quake are from Turkey and Sweden.(AP Photo/Michael Probst)

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Passengers gather outside the airport after the cancelation of many flights on the Greek island of Kos on Friday, July 21, 2017. A powerful earthquake sent a building crashing down on tourists at a bar on the Greek holiday island of Kos and struck panic on the nearby shores of Turkey early Friday, killing two people and injuring some 200 people. (Nikos Christofakis/InTime News via AP)

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A boy looks at a partially destroyed mosque after an earthquake in Kos on the island of Kos, Greece Friday, July 21, 2017. Greek authorities said two tourists killed in the overnight quake are from Turkey and Sweden.(AP Photo/Michael Probst)

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A car, damaged on the overnight earthquake is seen in Bodrum, Turkey, Friday, July 21, 2017. A powerful earthquake sent a building crashing down on tourists at a bar on the Greek holiday island of Kos and struck panic on the nearby shores of Turkey early Friday, killing two people and injuring some 200 people. (DHA-Depo Photos via AP)

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A man looks at boats that crashed on top of each other in the harbor in Bodrum, in the overnight earthquake is seen in Bodrum, Turkey, Friday, July 21, 2017. A powerful earthquake sent a building crashing down on tourists at a bar on the Greek holiday island of Kos and struck panic on the nearby shores of Turkey early Friday, killing two people and injuring some 200 people. (DHA-Depo Photos via AP)

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A man walks past a car, damaged in the overnight earthquake is seen in Bodrum, Turkey, Friday, July 21, 2017. A powerful earthquake sent a building crashing down on tourists at a bar on the Greek holiday island of Kos and struck panic on the nearby shores of Turkey early Friday, killing two people and injuring some 200 people. (DHA-Depo Photos via AP)

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Boats that crashed on top of each other in the harbor in Bodrum, Turkey, in the overnight earthquake are seen, Friday, July 21, 2017. A powerful earthquake sent a building crashing down on tourists at a bar on the Greek holiday island of Kos and struck panic on the nearby shores of Turkey early Friday, killing people and injuring some 200 people. (Yasar Anter/DHA-Depo Photos via AP)

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In this Tuesday June 6, 2017 file photo, a No Pipeline sign is posted next to a property line marker only a few feet from the center line of the route of the proposed Atlantic Coast Pipeline in Bolar, Va. The Federal Energy Regulatory Commission, which oversees interstate natural gas pipelines, released its final environmental impact statement Friday, July 21, 2017 for the proposed 600-mile (965-kilometer) pipeline, which has broad support from political and business leaders but is staunchly opposed by environmentalists and many affected landowners. (AP Photo/Steve Helber) **FILE**

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FILE - In this Tuesday June 6, 2017 file photo, Virginia Department of Environmental Quality Firector, David Paylor walks along a retention pond for a spring near the route of the proposed Atlantic Coast Pipeline in Bolar, Va. The Federal Energy Regulatory Commission, which oversees interstate natural gas pipelines, released its final environmental impact statement Friday, July 21, 2017 for the proposed 600-mile (965-kilometer) pipeline, which has broad support from political and business leaders but is staunchly opposed by environmentalists and many affected landowners. (AP Photo/Steve Helber, File)

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FILE - In a Tuesday June 6, 2017 file photo, hydrologist William K. Jones, walks up a mountain near the route of the proposed Atlantic Coast Pipeline in Bolar, Va. The Federal Energy Regulatory Commission, which oversees interstate natural gas pipelines, released its final environmental impact statement Friday, July 21, 2017 for the proposed 600-mile (965-kilometer) pipeline, which has broad support from political and business leaders but is staunchly opposed by environmentalists and many affected landowners. (AP Photo/Steve Helber, File)

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Britain's Prince William looks at the interior of an Airbus helicopter with his son Prince George in Hamburg, Germany, Friday, July 21, 2017. (Christian Charisius/dpa via AP)

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Britain's Prince William looks at the interior of an Airbus helicopter with his son Prince George in Hamburg, Germany, Friday, July 21, 2017. (Christian Charisius/dpa via AP)

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FILE - This is a May 19, 2017 file photo of National Air Traffic Services personnel giving a demonstration in the operations room at National Air Traffic Services in Swanwick southern England. Britain is poised to handle a record number of flights in its increasingly crowded skies. The NATS air traffic control agency said it expects to handle some 8,800 flights Friday, in what is expected to be the peak day of the busy summer travel season. (Andrew Matthews/PA File via AP)

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Debris sits on the damaged mosque after an earthquake in Kos on the island of Kos, Greece Friday, July 21, 2017. Greek authorities said two tourists killed in the overnight quake are from Turkey and Sweden.(AP Photo/Michael Probst)