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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Gov. Jerry Brown (left) meets with Prime Minister of India Narendra Modi in San Jose, Calif., on Sept. 27. Brown has been brokering his own international agreement on climate change. Jeff Chiu/AP hide caption

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Francisco Carlos Fonseca is the manager of Marina Confiança, a resort located on the banks of the Cantareira reservoir system. Behind him is a boat ramp that once led to a lake that he says used to be more than 100 feet deep. Kainaz Amaria/NPR hide caption

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For six months, filmmakers Grant Baldwin and Jen Rustemeyer vowed to eat only food entering the waste stream. They document their experiment, and the problem of food waste, in Just Eat It. Courtesy of Pure Souls Media hide caption

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