I subscribed to this podcast awhile back and highly recommend it.. (there's only something like 6 episodes t0tal). The award-winning PBS series, hosted and narrated by Edward Norton, first aired in the spring of 2005, reached 20 million viewers and won fourteen prestigious awards, including Best Series. It specifically focuses on global and freshwater issues. "Climate change… Ecosystem degradation… Clean energy… Poverty… Disease… Strange Days on Planet Earth connects some of the greatest issues of our day." - Strange Days on Planet Earth
Check out this (6 minute!) episode.. "Dirty Secrets"