Leaving with empty hands, should Rio+20 participants nonetheless leave with a sense of optimism? Posted 27 Jun 2012 / 0 Nature Editorial “A First Step“ Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on WhatsApp (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Telegram (Opens in new window)Click to email a link to a friend (Opens in new window) Related A Minor Post, Conservation Biology, Public Policy, Sustainability