Living on Earth: June 27, 2008
20 Years of Urgency / Tipping Point? / Not-So-Perma Permafrost / Agent Orange Researcher Passes / Small Technology, Big Questions / Green on the Go / Bumper to Bumper Bikes / Warm Water and Small Sea Creatures / Sustaining Life\nLearn more about your ad choices. Visit megaphone.fm/adchoices