Hanna Barczyk for NPR

Lake herring roe at the Dockside Fish Market in Grand Marais, Minn. Some workers at the market call it "Lake Superior Gold." Derek Montgomery for NPR hide caption

itoggle caption Derek Montgomery for NPR

A town in California's Central Valley plans to transform farmland into an eco-friendly residential community. An artist's rendering shows plans for Kings River Village in Reedley, Calif. Courtesy of the City of Reedley hide caption

itoggle caption Courtesy of the City of Reedley

Gary Broomell and his daughter, Debbie, pose behind a sign on their ranch in San Diego County. Their family has been growing citrus for generations, but lately, it's been hard staying in the black growing oranges, so they started a vineyard a few years ago. Lesley McClurg/ Capital Public Radio hide caption

itoggle caption Lesley McClurg/ Capital Public Radio

Some of Alaska's wildfires are dramatic: flames, vast plumes of smoke and firefighting battles. Here, on June 17, a helicopter releases hundreds of gallons of water onto the Stetson Creek Fire near Cooper Landing, Alaska. But even fires that look far quieter, like they're all burned out, can continue to smolder underground — and pose a dangerous threat to permafrost. Sgt. Balinda O'Neal/U.S. Army National Guard/AP hide caption

itoggle caption Sgt. Balinda O'Neal/U.S. Army National Guard/AP

Author and activist Bill McKibben paddles toward Follensby Pond in New York's Adirondack Mountains, along the route followed by Ralph Waldo Emerson in the summer of 1858. Julia Ferguson/NCPR hide caption

itoggle caption Julia Ferguson/NCPR