Michael Buckner/Getty Images

DCL

There are so many environmental issues confronting the world—if a film was made about each, you could probably spend an entire year watching them all. Thankfully, you won't have to do that—if you just see these three films, you'll get a pretty good idea of the some of the primary problems facing the ecosphere today. The state of food production, corporate involvement in green technology development, and the mother of all modern green issues, global warming, are tackled in these celebrated documentaries.

An Inconvenient Truth (2006): Probably the epitome of the modern green documentary, Al Gore's call to arms in the battle against global warming is one of the most notorious films of the last decade. Despite claims of exaggeration and dubious denials of its facts, An Inconvenient Truth remains essential green viewing.

Future of Food (2004): Primarily dealing with the proliferation of genetically modified foods (GMOs), the film looks at the problems independent farms face and considers the health effects of the increasingly homogenous strains of seed. It observes the corrupt dealings of food giant Monsanto, and delves into, yes, the future of food for the world.

Who Killed the Electric Car? (2006): This film details General Motor's investment in, creation, and baffling subsequent abandonment of their electric car, the EV1. It's a sometimes conspiracy theory prone, but otherwise compelling examination of the collision of interests in politics, corporations, and consumers when unveiling new energy efficient technologies. Look to this one as a parable as we see a further emergence of green products.

Which green documentaries did we leave out? Drop us a comment and tell us about your favorite eco doc of the last five years.