Chef René Redzepi said his Copenhagen restaurant, Noma, deemed the best in the world, isn't sustainable and will close next year. But if an establishment charging top dollar can't survive, what restaurant can? KCRW's Evan Kleiman explains. This episode was produced by Hady Mawajdeh, edited by Matt Collette, fact-checked by Laura Bullard, engineered by Paul Robert Mounsey, and hosted by Noel King. Transcript at vox.com/todayexplained   Support Today, Explained by making a financial contribution to Vox! bit.ly/givepodcasts Learn more about your ad choices. Visit podcastchoices.com/adchoices