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Hervé Zarka uses a tool called a simoussi to rake up salt in his marshland on the island of Noirmoutier in France. He says there are many minerals in natural sea salt, such as magnesium and potassium, that aren't in industrial salt. Eleanor Beardsley/NPR hide caption

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Eleanor Beardsley/NPR

Harvesting Salt By Hand Is Making A Comeback In France

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Kelp plants grow on a 30-foot-long, white PVC pole suspended in the water. If this is successful, instead of just one row, there would be a whole platform, hundreds of meters across and hundreds of meters deep, full of kelp plants. Courtesy of David Ginsburg/Wrigley Institute hide caption

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Courtesy of David Ginsburg/Wrigley Institute

Scientists Hope To Farm The Biofuel Of The Future In The Pacific Ocean

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Wade Dooley, in Albion, Iowa, uses less fertilizer than most farmers because he grows rye and alfalfa, along with corn and soybeans. "This field [of rye] has not been fertilized at all," he says. Dan Charles/NPR hide caption

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Dan Charles/NPR

Does 'Sustainability' Help The Environment Or Just Agriculture's Public Image?

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'What She Ate': The Culinary Biographies Of Some Remarkable Women

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Anhydrous ammonia tanks in a newly planted wheat field. Walmart has promised big cuts in emissions of greenhouse gases. To meet that goal, though, the giant retailer may have to persuade farmers to use less fertilizer. It won't be easy. TheBusman/Getty Images hide caption

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TheBusman/Getty Images

Can Anyone, Even Walmart, Stem The Heat-Trapping Flood Of Nitrogen On Farms?

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Lillie Pete sifts the juniper ash before adding it to her blue corn mush. Laurel Morales/KJZZ hide caption

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Laurel Morales/KJZZ

To Get Calcium, Navajos Burn Juniper Branches To Eat The Ash

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The Eclipse Magic Cone features a black waffle cone made with coconut ash and tipped with edible gold, and an interior filled with spiced marshmallow fluff and a golden-yellow ice cream flavored with ginger and turmeric. Courtesy of Salt & Straw hide caption

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Courtesy of Salt & Straw

Bike patrol volunteers give directions to visitors at Acadia National Park. The Trump administration has rolled back an Obama-era policy put in place to encourage national parks to end the sale of bottled water. Shawn Patrick Ouellette/Portland Press Herald/Getty Images hide caption

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Shawn Patrick Ouellette/Portland Press Herald/Getty Images

During the day on Aug. 21, large swaths of farmland will be plunged into darkness, and temperatures will drop about 10 degrees. Scientists are waiting to see how crops and animals react. Daniel Acker/Bloomberg/Getty Images hide caption

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Daniel Acker/Bloomberg/Getty Images

Binge-drinking sounds like an all-night bender, but here's a reality check: Many social drinkers may "binge" without knowing it. Women who drink four or more drinks on an occasion are binge-drinking. Ann Boyajian/Getty Images/Illustration Works hide caption

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Ann Boyajian/Getty Images/Illustration Works

With Heavy Drinking On The Rise, How Much Is Too Much?

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In this photo taken by Russian cosmonaut Sergey Ryazanskiy, the SpaceX Dragon capsule arrives at the International Space Station on Wednesday, stocked with scientific equipment, supplies — and ice cream. NASA via AP hide caption

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NASA via AP

The Best Item In An Astronaut's Care Package? Definitely The Ice Cream

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