Curated OER
Urban Ecosystems 4: Metabolism of Urban Ecosystems
Students discover that material and energy uses by a city come from outside the city boundaries. They realize that the pathway of these material is linear instead of cyclical as they are in natural ecosystems.
PBS
Bill Moyers Reports: Earth on Edge
PBS presents this report by Bill Moyer on the current state of the earth. Information is provided on each of the planets ecosystems as well as ways to get involved. You are even able to access portions of the program that was aired.