Can Paris Save The Planet? Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email Men hold a sign reading, "There Is No Planet B", as thousands march through downtown Oslo, Norway, to support action on global climate change, September 21, 2014. ( Ryan Rodrick Beiler / Shutterstock ) Produced by Elizabeth Ross Produced by PRI and WNYC