(This clip is audio only.) In a NOW web-exclusive audio interview, Robert Redford talks to Host David Brancaccio about why he thinks "change is in the air" as businesses find value in going green. Redford says environmental issues are gaining traction and that global warming will be "huge" in the 2008 presidential election. More on the documentary he produced and appears in: http://www.pbs.org/now/news/324.html
