Film festivals everywhere are going greener, with this year's Sundance Film Festival featuring at least eight films with environmental themes! But for an all-enviro-films festival, you'll have to visit Washington D.C.

In just a couple months, the 17th Annual Environmental Film Festival will be happening in our nation's capital. More than 115 eco-themed films are expected to attract 24,000 film buffs during the 12-day festival, happening March 11 - 22, 2009.

Films include Return of the Honeybee, "a piercing investigative look at the economic, political and spiritual implications of the worldwide disappearance of the honeybee," and Earth Days, "a visually stunning, globe-spanning chronicle of watershed events and consciousness-changing realizations that prompted a new environmental awareness." The schedule also includes a number of short films you'd be unlikely to see in a theater outside this festival.

Some film screenings are free; others cost $10 for general admission tickets. If you're short on cash, volunteer to catch more of the films free of charge -- though the festival's already got so many volunteers that there's now a waiting list.