Here's a a great speech by Edward Burtynsky regarding his images and the topic of sustainability. It's taken from the inspiring website TED:Ideas Worth Spreading.
Here's another site with solutions-based journalism that takes a big-picture approach to sustainability.
Hope you enjoy.
-Kevin
www.kkunishi.blogspot.com
"Accepting his 2005 TED Prize, photographer Edward Burtynsky makes a wish: that his images -- stunning landscapes that document humanity's impact on the world -- help persuade millions to join a global conversation on sustainability."