Environment

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The stacks from the Valero Benicia Refinery are seen as a pedestrian walks in a nearby neighborhood, Wednesday, July 12, 2017, in Benicia, Calif. California Gov. Jerry Brown is racing to convince state lawmakers to extend California's cap-and-trade program which puts a price on carbon emitted by polluters, including oil refineries. The program has been closely watched around the world as a market-based way to reduce greenhouse gas emissions, but it expires in 2020. (AP Photo/Rich Pedroncelli)

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Gov. Jerry Brown is racing to convince state lawmakers to extend California's cap-and-trade program which puts a price on carbon emitted by polluters, including oil refineries like the Valero Benicia Refinery seen Wednesday, July 12, 2017, in Benicia, Calif. The program has been closely watched around the world as a market-based way to reduce greenhouse gas emissions, but it expires in 2020. (AP Photo/Rich Pedroncelli)

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Jay Miller of the Madison Forestry Department used a chainsaw on a damaged ash tree after a lightning strike destroyed it early Wednesday July 12, 2017, in Madison, Wis. Heavy thunderstorms are flooding roads and low-lying areas in southern Wisconsin. (Barry Adams/Wisconsin State Journal via AP)

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The U.S. Missile Defense Agency revealed Tuesday that a Terminal High Altitude Area Defense, or THAAD, system based in Alaska, like the one shown here in South Korea, successfully tracked and shot down a simulated intermediate-range ballistic missile that closely resembles the ones North Korea is developing. (Associated Press/File)

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Smoke rises from wild fires burning on the slopes of Mt. Vesuvius volcano as the Castel dell'Ovo castle in seen in the foreground, in Naples, Italy, Wednesday, July 12, 2017. Firefighters are battling wildfires throughout southern Italy, including along the slopes of the volcano Mount Vesuvius near Naples. Wildfires have been raging for days, and Italy's civil protection agency on Tuesday said it was responding with helicopters to 18 blazes, including four in Campania, the region which includes Naples, and two each in Sicily and Basilicata. (Ciro Fusco/ANSA via AP)

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Smoke rises from wild fires burning on the slopes of Mt. Vesuvius volcano as the Castel dell'Ovo castle in seen in the foreground, in Naples, Italy, Wednesday, July 12, 2017. Firefighters are battling wildfires throughout southern Italy, including along the slopes of the volcano Mount Vesuvius near Naples. Wildfires have been raging for days, and Italy's civil protection agency on Tuesday said it was responding with helicopters to 18 blazes, including four in Campania, the region which includes Naples, and two each in Sicily and Basilicata. (Ciro Fusco/ANSA via AP)

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Woodland fires burn near a tourist resort where, according to firefighter reports, some several hundred tourists have been evacuated by land and sea, in the Sicilian town of San Vito lo Capo, southern Italy, Wednesday, July 12, 2017. Wildfires have been raging for days and Italian firefighters said Wednesday they were responding to 887 fires throughout Italy, 628 of which regarded vegetation and woodlands. (Italian Firefighters Vigili del Fuoco via AP)

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Smoke rises from wild fires burning on the slopes of Mt. Vesuvius volcano as the Castel dell'Ovo castle in seen in the foreground, in Naples, Italy, Wednesday, July 12, 2017. Firefighters are battling wildfires throughout southern Italy, including along the slopes of the volcano Mount Vesuvius near Naples. Wildfires have been raging for days, and Italy's civil protection agency on Tuesday said it was responding with helicopters to 18 blazes, including four in Campania, the region which includes Naples, and two each in Sicily and Basilicata. (Ciro Fusco/ANSA via AP)

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A man is helped by emergency personnel as he is rescued from a partially collapsed building, Wednesday July 12, 2017, in Washington, Pa. (Celeste Van Kirk/Observer-Reporter via AP)

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A man is helped by emergency personnel after he was rescued from a partially collapsed building, Wednesday July 12, 2017, in Washington, Pa. (Celeste Van Kirk/Observer-Reporter via AP)

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City of Elgin, Ill., public works employees work to clear drains Wednesday morning, July 12, 2017, after drenching rains caused flooding in streets and homes. (Rick West/Daily Herald via AP)

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The image released by European Space Agency ESA shows a photo taken by the Copernicus Sentinel-1 mission on July 12, 2017, when a lump of ice more than twice the size of Luxembourg has broken off the Larsen-C ice shelf in Antarctica, spawning one of the largest icebergs on record and changing the outline of the Antarctic Peninsula forever. (ESA/Copernicus via AP)

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This is a Feb. 2017 image of the Larsen C ice shelf in Antarctica made available by the Antarctic Survey on Wednesday, July 12, 2017. A vast iceberg with twice the volume of Lake Erie has broken off from a key floating ice shelf in Antarctica, scientists said. The iceberg broke off from the Larsen C ice shelf, scientists at the University of Swansea in Britain said. The iceberg, which is likely to be named A68, is described as weighing 1 trillion tons (1.12 trillion U.S. tons). (British Antarctic Survey via AP) ** FILE **

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This February 2017 frame from video provided by the British Antarctic Survey shows the Larsen C ice shelf in Antarctica. A vast iceberg with twice the volume of Lake Erie broke off from the Larsen C ice shelf, scientists said Wednesday, July 12, 2017. The iceberg is described as weighing 1 trillion tons (1.12 trillion U.S. tons). (British Antarctic Survey via AP)

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This Nov. 10, 2016 aerial photo released by NASA, shows a rift in the Antarctic Peninsula's Larsen C ice shelf. A vast iceberg with twice the volume of Lake Erie has broken off from a key floating ice shelf in Antarctica, scientists said Wednesday July 12, 2017 . The iceberg broke off from the Larsen C ice shelf, scientists at the University of Swansea in Britain said. The iceberg, which is likely to be named A68, is described as weighing 1 trillion tons (1.12 trillion U.S. tons).(John Sonntag/NASA via AP)

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A tractor-trailer drives through high water in Franklin, Ind., Tuesday, July 11, 2017. Storms packing heavy rains and strong winds caused road flooding and scattered damage across central Indiana a day after at least two tornadoes hit northern Indiana. (Sarah Stier/The Indianapolis Star via AP)

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Kyle Morgan pumps water out of his front yard in Whiteland, Ind., Tuesday, July 11, 2017. Storms packing heavy rains and strong winds caused road flooding and scattered damage across central Indiana a day after at least two tornadoes hit northern Indiana. (Sarah Stier/The Indianapolis Star via AP)

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A man is reflected in the water as he walks along a pier in Alimos suburb, in Athens, Wednesday, July 12, 2017 . A summer heatwave has hit Greece, with temperatures reaching a high of 39 degrees Celsius (102 Fahrenheit) in Athens. (AP Photo/Petros Giannakouris)

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This Nov. 10, 2016 aerial photo released by NASA, shows a rift in the Antarctic Peninsula's Larsen C ice shelf. A vast iceberg with twice the volume of Lake Erie has broken off from a key floating ice shelf in Antarctica, scientists said Wednesday July 12, 2017. The iceberg broke off from the Larsen C ice shelf, scientists at the University of Swansea in Britain said. The iceberg, which is likely to be named A68, is described as weighing 1 trillion tons (1.12 trillion U.S. tons).(John Sonntag/NASA via AP)

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FILE - In this Sept. 12, 2016, photo released by China's Xinhua News Agency, officers and sailors of China's People's Liberation Army (PLA) Navy hold a welcome ceremony as a Russian naval ship arrives in port in Zhanjiang in southern China's Guangdong Province. China says its latest-generation warships have conducted live-firing drills in the Mediterranean Sea Monday, July 10, 2017, while en route to joint exercises with the Russian navy. (Zha Chunming/Xinhua via AP, File)