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Carrageenan is an extract derived from seaweeds like these harvested off Hingutanan Island, Bien Unido, Bohol, Philippines. Farley Baricuatro/Getty Images hide caption

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Farley Baricuatro/Getty Images

Tea pickers stand in the scorching sun, hand-plucking the tea leaves for about eight hours a day. Furkan Latif Khan/NPR hide caption

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Furkan Latif Khan/NPR

Tea Farmer In India Leads Charge For Organic, Evades The Charge Of Elephants

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Organic farmers who grow their crops in soil participate in a protest in Stowe, Vt., in 2015. Critics say the organic label is at essence about the health of soil, and did not want to allow crops raised in hydroponic systems to be labeled organic. Their efforts to strip hydroponic vegetables of the organic label failed this week. Wilson Ring/AP Images hide caption

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Wilson Ring/AP Images

Hydroponic Veggies Are Taking Over Organic, And A Move To Ban Them Fails

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The destructive diamondback moth has spread across the world and mutated to become immune to each new chemical pesticide designed to slay it. Jonathan Lewis/Getty Images hide caption

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Jonathan Lewis/Getty Images

A farm worker runs a tine weeder on Jason Hunton's organic wheat crop. It's like a giant comb, scraping up weeds and bits of wheat along with it. Courtney Flatt/Northwest Public Radio hide caption

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Courtney Flatt/Northwest Public Radio

Non-GMO labels, like this one at Whole Foods, may strengthen consumer perceptions that genetically modified foods may carry risks to health. Ordon Chibroski/Portland Press Herald/Getty Images hide caption

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Ordon Chibroski/Portland Press Herald/Getty Images

An assortment of organic vegetables is seen on display. A growing body of evidence documents how farming methods can influence the nutritional content of foods. Justin Sullivan/Getty Images hide caption

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Justin Sullivan/Getty Images