Environment

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A Nevada Department of Transportation snow removal vehicle clears the road on the Mt. Rose Highway near Reno, Nev., Tuesday, Feb. 21, 2017. One of the strongest in a series of winter-long storms pummeled the Sierra Nevada with another 3 feet of snow on Tuesday, dumping triggering an avalanche that buried a major highway near Lake Tahoe in 20 feet of snow and dumping record-breaking rain on Reno for the second day in a row. (Jason Bean/The Reno Gazette-Journal via AP)

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A Nevada Highway Patrol officer helps a stuck motorist on the Mt. Rose Highway near Reno, Nev., Tuesday, Feb. 21, 2017. One of the strongest in a series of winter-long storms pummeled the Sierra Nevada with another 3 feet of snow on Tuesday, dumping triggering an avalanche that buried a major highway near Lake Tahoe in 20 feet of snow and dumping record-breaking rain on Reno for the second day in a row. (Jason Bean/The Reno Gazette-Journal via AP)

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Sunrise over the Atlantic Ocean as seen from the Sanderling Resort, located on North Carolina's Outer Banks. (Eric Althoff/The Washington Times)

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Pittsburgh Penguins' Patric Hornqvist (72), of Sweden, falls to the ice while chasing the puck with Carolina Hurricanes' Viktor Stalberg (25), of Sweden, during the first period of an NHL hockey game in Raleigh, N.C., Tuesday, Feb. 21, 2017. (AP Photo/Gerry Broome)

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Flood waters inundate a recreation area Tuesday, Feb. 21, 2017, in Rio Linda, Calif. Water overflowing from nearby Dry Creek caused officials to call for a voluntary evacuation of parts of the small community north of Sacramento. (AP Photo/Rich Pedroncelli)

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Heavy storms over the past two weeks caused parts of the shoulder and one lane of westbound Highway 50 give way, Tuesday, Feb. 21, 2017, near Pollock Pines, Calif. Crews have one lane open, of the four lane highway, as they work to repair the hole that is about 40 feet long and 17 feet wide on one of the main routes to Lake Tahoe. (AP Photo/Rich Pedroncelli)

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New EPA Administrator Scott Pruitt invoked conservationist John Muir in his remarks Tuesday, which riled up the conservation lobby, who say Mr. Pruitt's track record shows him to be no friend to the environment. (Associated Press)

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Deb Wolf, a high school science instructional coach who helps teachers in Sioux Falls, S.D., schools write science curriculum, poses for a photo in Sioux Falls on Friday, Feb. 17, 2017. South Dakota legislators are weighing whether to let teachers decide how much skepticism to work into lessons on contentious scientific topics such as evolution and climate change. (AP Photo/James Nord)

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Ken Okenquist, center right, and his grandson Keaton Davis, 11, watch the flooding caused by Coyote Creek Tuesday, Feb. 21, 2017, in Morgan Hill, Calif. Rains have saturated once-drought stricken California but have created chaos for residents hit hard by the storms. The latest downpours swelled waterways to flood levels and left about half the state under flood, wind and snow advisories. (AP Photo/Marcio Jose Sanchez)

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Water from the Lake Anderson Reservoir gushes down a spillway Tuesday, Feb. 21, 2017, in Morgan Hill, Calif. Rains have saturated once-drought stricken California but have created chaos for residents hit hard by the storms. The latest downpours swelled waterways to flood levels and left about half the state under flood, wind and snow advisories. (AP Photo/Marcio Jose Sanchez)

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Heavy storms over the past two weeks caused parts of the shoulder and one lane of westbound Highway 50 give way, Tuesday, Feb. 21, 2017, near Pollock Pines, Calif. Crews have one lane open, of the four lane highway, as they work to repair the hole that is about 40 feet long and 17 feet wide on one of the main routes to Lake Tahoe. (AP Photo/Rich Pedroncelli)

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Heavy storms over the past two weeks caused parts of the shoulder and one lane of westbound Highway 50 give way, Tuesday, Feb. 21, 2017, near Pollock Pines, Calif. Crews have one lane open, of the four lane highway, as they work to repair the hole that is about 40 feet long and 17 feet wide on one of the main routes to Lake Tahoe. (AP Photo/Rich Pedroncelli)

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A sign is submerged in the water from Coyote Creek Tuesday, Feb. 21, 2017, in Morgan Hill, Calif. Rains have saturated once-drought stricken California but have created chaos for residents hit hard by the storms. The latest downpours swelled waterways to flood levels and left about half the state under flood, wind and snow advisories. (AP Photo/Marcio Jose Sanchez)

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Flood waters inundate a bicycle motocross track, Tuesday, Feb. 21, 2017, in Rio Linda, Calif. Water overflowing from nearby Dry Creek caused officials to call for a voluntary evacuation for parts of the small community north of Sacramento. (AP Photo/Rich Pedroncelli)

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Maple tree sap drips from a tap into a bucket, Tuesday, Feb. 21, 2017, in Brookline, N.H. Sen. Maggie Hassan, D-NH, led a discussion with maple syrup producers in New Hampshire about how climate change is impacting their industry. (AP Photo/Elise Amendola)

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Parker's Maple Barn employee Jon Jonis carries maple tree sap he gathered from metal buckets, Tuesday, Feb. 21, 2017, in Brookline, N.H. Sen. Maggie Hassan, D-NH, led a discussion with maple syrup producers in New Hampshire about how climate change is impacting their industry. (AP Photo/Elise Amendola)

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Parker's Maple Barn employee Jon Jonis taps a maple tree, Tuesday, Feb. 21, 2017, in Brookline, N.H. Sen. Maggie Hassan, D-NH, led a discussion with maple syrup producers in New Hampshire about how climate change is impacting their industry. (AP Photo/Elise Amendola)

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Parker's Maple Barn employee Jon Jonis taps a maple tree, Tuesday, Feb. 21, 2017, in Brookline, N.H. Sen. Maggie Hassan, D-NH, led a discussion with maple syrup producers in New Hampshire about how climate change is impacting their industry. (AP Photo/Elise Amendola)