Environment

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Nurses walk wearing masks to protect themselves form the swine flu virus outside the Naypyitaw Hospital Tuesday, July 25, 2017, in Naypyitaw, Myanmar. Public health officials in Myanmar say that H1N1 flu, also known as swine flu, has killed three people out of 13 confirmed cases of the infection. (AP Photo/Aung Shine Oo)

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Women wear masks to protect themselves against the swine flue virus, Tuesday, July.25, 2017, in Yangon, Myanmar. Public health officials in Myanmar say that H1N1 flu, also known as swine flu, has killed three people out of 13 confirmed cases of the infection. (AP Photo/Thein Zaw)

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Nurses cover their faces with masks to protect from the spread of the swine flu outside the Naypyitaw hospital, Tuesday, July 25, 2017, in Naypyitaw, Myanmar. Public health officials in Myanmar say that H1N1 flu, also known as swine flu, has killed three people out of 13 confirmed cases of the infection. (AP Photo/Aung Shine Oo)

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CORRECTS CREDIT TO PAUL W. GILLESPIE FROM PHIL DAVIS - Traffic is backed up on Route 8, a result of storm damage on Kent Island Monday, July 24, 2017, in Kent Island, Md. A National Weather Service team is headed to Maryland’s Eastern Shore Monday to determine whether a tornado touched down there amid severe storms. (Paul W. Gillespie/The Baltimore Sun via AP)

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CORRECTS CREDIT TO PAUL W. GILLESPIE FROM PHIL DAVIS - A tree is down on the side of Route 8 south Monday, July 24, 2017, in Kent Island, Md. A National Weather Service team is headed to Maryland’s Eastern Shore Monday to determine whether a tornado touched down there amid severe storms. (Paul W. Gillespie/The Baltimore Sun via AP)

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This frame from video by WUSA-TV shows homes Monday, July 24, 2017, destroyed by severe weather in Queen Anne's County, Md. Officials on Maryland's Eastern Shore are asking residents to shelter in place after severe weather overnight caused extensive damage and knocked out power to thousands. (WUSA-TV via AP)

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This frame from video by WUSA-TV shows homes Monday, July 24, 2017, destroyed by severe weather in Queen Anne's County, Md. Officials on Maryland's Eastern Shore are asking residents to shelter in place after severe weather overnight caused extensive damage and knocked out power to thousands. (WUSA-TV via AP)

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FILE -- In this July 13, 2017 file photo California Gov. Jerry Brown listens as members of the Senate Environmental Quality Committee discuss a pair of climate change bills he supports, in Sacramento, Calif. As his fourth and final term winds down Brown will spend the final 17 months in office working on California's housing crisis and fighting for ambitious projects to build a high-speed rail system and re-engineer California's water system. (AP Photo/Rich Pedroncelli, file)

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Officials said the 2015 fracking guidelines were "unnecessarily duplicative of state and some tribal regulations." (Associated Press)

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FILE - IN this Dec. 2, 2009, file photo, the Total Port Arthur refinery is shown in Port Arthur, Texas. Federal lawsuits against the U.S. Environmental Protection Agency were filed claiming the agency has failed to correct Texas air pollution control permits with loopholes that make state enforcement rare. The suits filed Thursday, July 20, 2017, by the nonprofit Washington, D.C.-based Environmental Integrity Project, target permits for the largest integrated petrochemical factory in the U.S., three refineries near the Houston Ship Channel including the largest petroleum refinery in the U.S. and a coal-fired power plant east of Dallas. (AP Photo/David J. Phillip, File)

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In this Sunday, July 23, 2017, photo, a wildfire burns near Sand Springs, Mont. Massive wildfires burning in eastern Montana have destroyed at least a dozen homes and led ranchers to cut escape routes in fences for cattle as the powerful blazes jump rivers, roads and bulldozer-cleared fire breaks. (Rebecca Noble/The Billings Gazette via AP)

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In this Sunday, July 23, 2017, photo, a plane drops a defensive line of retardant on a wildfire near Sand Springs, Mont. Massive wildfires burning in eastern Montana have destroyed at least a dozen homes and led ranchers to cut escape routes in fences for cattle as the powerful blazes jump rivers, roads and bulldozer-cleared fire breaks. (Rebecca Noble/The Billings Gazette via AP)

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A Green Bay Packers fan with a Brett Favre tattoo attends the team's annual Green Bay Packers shareholders' meeting at Lambeau Stadium on Monday, July 24, 2017, in Green Bay, Wis. (Adam Wesley/The Post-Crescent via AP)

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A program is held at the annual Green Bay Packers shareholders' meeting at Lambeau Stadium on Monday, July 24, 2017, in Green Bay, Wis. (Adam Wesley/The Post-Crescent via AP)

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In this Sunday, July 23, 2017, image taken from video provided by the Pima County Sheriff's office, a stranded hiker is rescued from torrential flash flood waters near Tucson, Ariz. Over a dozen hikers were stranded Sunday in a scenic canyon on the outskirts of Tucson, just over a week after a flash flood killed 10 members of an extended family more than 140 miles to the north. (Pima County Sheriff via AP)

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In this Sunday, July 16, 2017, sea ice breaks apart as the Finnish icebreaker MSV Nordica equipped with enclosed life boats sails the Chukchi Sea to traverse the Arctic's Northwest Passage. The MSV Nordica icebreaker has all the safety equipment of a modern oceangoing vessel, plus some more because it works in hostile and remote Arctic waters. In a general emergency, such as a hole in the hull, those aboard would grab a survival suit stowed beneath each bunk and head for one of two muster stations on deck to don a life vest. (AP Photo/David Goldman)