Living on Earth: CURWOOD: It’s Living on Earth, I’m Steve Curwood. The latest round of talks leading up to an updated UN climate change treaty wound up April 8 in Bonn, Germany with the US pledging to work hard in the effort to reach consensus by year’s end in Copenhagen. And even as delegates met, an ice bridge gave way in Antarctica, the tenth such major ice collapse in recent times. US Secretary of State Hillary Clinton was quick to link the climate talks to the agenda of the first ever meeting of …