Oranges ripen in a grove in Plant City, Fla. Citrus greening, a disease spread by a tiny insect that ruins oranges and eventually kills the trees, has put the future of the state's $10 billion citrus industry in doubt. Chris O'Meara/AP hide caption

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Coal fires burn early in the morning in January 2014 at a privately owned coal mine in India's Jharkand state, making the air dense with noxious smoke and dust. Forty percent of India's mineral wealth lies in Jharkhand. Johnny Haglund hide caption

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Soybeans are sprayed in Iowa in 2013. Enlist Duo is a mixture of two chemicals that farmers have used separately for many years: glyphosate (also known as Roundup) and 2,4-D. The new formulation is intended to work hand-in-hand with a new generation of corn and soybean seeds that are genetically engineered to tolerate sprays of both herbicides. Charlie Neibergall/AP hide caption

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Peponapis pruinosa is a species of bee in the tribe Eucerini, the long-horned bees. This bee relies on wild and cultivated squashes, pumpkins, gourds and related plants. Wikimedia/USDA hide caption

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Beijing's chronic high pollution has forced residents to adjust to living with the haze. China is the world's biggest greenhouse gas emitter, but until recently, the government treated air pollution and climate change as separate issues, saying climate change was a Western problem. Andy Wong/AP hide caption

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The Beijing Environment Exchange, one of seven emissions trading pilot programs in China, may be part of a nationwide carbon market by as early as 2017. Anthony Kuhn/NPR hide caption

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