This 47 minute video on the essence of debt currency briefly touches on perhaps the critical environmental issue of the time: can anything be done about our deficits in the real world (in carbon sinks, fisheries, clean water, etc.) if we have no way to think about public policy except through the language of "what it will do to the economy"?
Despite the paranoid tone, the fundamental question asked in this video is the right one: is a sustainable world even plausible if we continue to accept a monetary system that must grow without end?