Environment

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The murky waters of the Black River surround businesses and two cars along U.S. 67 in Pocahontas, Ark. Wednesday May 3, 2017. Downpours that dumped up to a foot of rain in parts of the nation’s midsection last weekend led to the sudden surge of water. (Stephen B. Thornton/The Arkansas Democrat-Gazette via AP)

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The Arkansas Highway and Transportation Department redirects traffic from the closed section of U.S. 63 between Walnut Ridge and Portia, Ark., Wednesday, May 3, 2017. (Staci Vandagriff/The Jonesboro Sun via AP)

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Two rental houses look underwater next to the Meramec River on Opps Lane in Fenton, Mo., Wednesday, May 3, 2017. Heavy rains have swollen many rivers to record levels in parts of Missouri, Illinois, Oklahoma and Arkansas. Five deaths have been blamed on flooding in Missouri, while hundreds of people have been displaced and thousands more are potentially in harm's way. (J.B. Forbes/St. Louis Post-Dispatch via AP)

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Pacific building and fire inspectors look through Pacific Package Liquor to deem it safe for occupancy on E. Osage Street in Pacific, Mo., Wednesday, May 3, 2017. Heavy rains have swollen many rivers to record levels in parts of Missouri, Illinois, Oklahoma and Arkansas. Five deaths have been blamed on flooding in Missouri, while hundreds of people have been displaced and thousands more are potentially in harm's way. (Robert Cohen/St. Louis Post-Dispatch via AP)

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This combination of file photos shows North Korean leader Kim Jong-un, left, on April 15, 2017 waving during a military parade to celebrate the 105th birth anniversary of Kim Il-sung in Pyongyang, North Korea, and Chinese President Xi Jinping, right, on April 7, 2017, as he smiles during a meeting with Alaska Gov. Bill Walker in Anchorage, Alaska, following his meetings with President Donald Trump in Florida. (AP Photo/Wong Maye-E, Michael Dinneen, Files)

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In this Oct. 20, 2016 photo, dead oyster shells are seen in the Indian River Lagoon, Fla. Once plentiful oysters have died off in the lagoon due to increased boat traffic as the region's population has swelled faster than anywhere else in the state. Last year, baby oysters died off en masse for the first time, a victim of increasing brown algae in these once pristine waters. An AP analysis of water testing data found that phosphorus pollution from farms and urban development, which the algae feed on, increased by 75-percent in the lagoon from 2000-2016. (AP Photo/Jason Dearen)

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FILE- In this Feb. 17, 2016 file photo, Bob Chew, 64, of Edgewater, Fla., left, an avid fisherman and environmentalist, and Capt. Frank Brownell, 62, fish the murky waters of Mosquito Lagoon on the Indian River Lagoon, Fla. The 153-mile-long Indian River Lagoon has suffered from harmful algae blooms caused by pollutants like fertilizers and human waste. (Red Huber/Orlando Sentinel via AP, File) MAGS OUT; NO SALES; MANDATORY CREDIT

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In this Friday, Feb. 10, 2017 photo,a group of kayakers explore a canal in the Indian River Lagoon, Fla. America’s most biologically diverse waterway is seriously ill. Despite hundreds of millions of tax dollars spent to reduce pollution in Florida’s 153-mile-long Indian River Lagoon, an Associated Press analysis of water quality data from 2000-2015 found stark increases in pollutants that cause harmful algal blooms. (AP Photo/John Raoux)

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In this Friday, Feb. 10, 2017 photo, tree limbs knocked over by Hurricane Matthew in 2016 litter the shoreline as a boat passes by an inlet in the Indian River Lagoon, Fla. America’s most biologically diverse waterway is seriously ill. Despite hundreds of millions of tax dollars spent to reduce pollution in Florida’s 153-mile-long Indian River Lagoon, an Associated Press analysis of water quality data from 2000-2015 found stark increases in pollutants that cause harmful algal blooms. (AP Photo/John Raoux)

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In this Oct. 20, 2016 photo, a white ibis eats in an oyster bed in the Indian River Lagoon, Fla. Once plentiful oysters have died off in the lagoon due to increased boat traffic as the region's population and development has swelled faster than anywhere else in the state. Last year, baby oysters died off en masse for the first time, a victim of increasing brown algae in these once pristine waters.An AP analysis of water testing data found that phosphorus pollution from farms and urban development, which the algae feed on, increased by 75-percent in the lagoon from 2000-2016. (AP Photo/Jason Dearen)

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In this Friday, Feb. 10, 2017 photo, Austin Mahan, owner of A Day Away Kayak Outfitters prepares to take a group out on an excursion in the Indian River Lagoon, Fla. America’s most biologically diverse waterway is seriously ill. Despite hundreds of millions of tax dollars spent to reduce pollution in Florida’s 153-mile-long Indian River Lagoon, an Associated Press analysis of water quality data from 2000-2015 found stark increases in pollutants that cause harmful algal blooms. (AP Photo/John Raoux)

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FILE- In this June 29, 2016 file photo, an aerial photo shows blue-green algae enveloping an area along the St. Lucie River in Stuart, Fla. The Indian River Lagoon is the most diverse lagoon ecosystem in the Northern hemisphere. (Greg Lovett/The Palm Beach Post via AP, File)

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FILE-In this June 27, 2016 file photo, water full of algae laps along the Seweall's Point shore on the St. Lucie River, Fla. Despite hundreds of millions of tax dollars spent to reduce pollution in Florida's 153-mile-long Indian River Lagoon, an Associated Press analysis of water quality data from 2000-2015 found stark increases in pollutants that cause harmful algal blooms. (Richard Graulich/The Palm Beach Post via AP, File)

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FILE- In this June 29, 2016 file photo, boats docked at Central Marine in Stuart, Fla., are surrounded by blue green algae. The 153-mile-long Indian River Lagoon has been plagued by harmful algae blooms. Water quality testing data analyzed by the AP showed the average phosphorous level _ a byproduct of fertilizers and human waste that algae thrive on, rose nearly 75 percent between 2000 and 2016. (Greg Lovett/The Palm Beach Post via AP, File)

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Energy Secretary Rick Perry (center) used to boast of how often he sued the Obama administration over environmental and energy issues when he was governor or Texas, but he now faces a lawsuit from his own state to recover funds for an unused nuclear waste site in Nevada. (Associated Press)

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FILE - This Jan. 7, 2013, file photo, shows the Shell floating drill rig Kulluk in Kodiak Island, Alaska's Kiliuda Bay as salvage teams conduct an in-depth assessment of its seaworthiness after it ran aground off an island near Kodiak as it was being towed across the Gulf of Alaska in stormy weather following the 2012 drilling season. Less than a week after President Donald Trump took steps to put U.S. Arctic and Atlantic waters back in play for offshore drilling, 10 environmental and Alaska Native groups sued Wednesday, May 3, 2017, to maintain the ban on oil and gas exploration. (James Brooks/Kodiak Daily Mirror via AP, File)