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This year’s Environmental Film Festival features 115 films, which is a pretty daunting number of save-the-­rainforest, save-the-near-extinct-animal, and save-something-else-that-needs-saving documentaries. But the opening day lineup makes it clear that the festival isn’t too busy protecting Mother Nature to maintain an occasional local or lighthearted focus. The “Land, Sea & Sky” program kicks off with D.C. Water and Sewer Authority’s It’s Your Water, Use It Wisely (by “wisely,” one can only assume the true meaning is “under no circumstances should you ever drink it”) and is followed by a trio of animated shorts, which feature a giraffe accidentally bumping the moon out of orbit (Jungle Beat: Moondance), a zoo’s inhabitants figuratively and literally devouring books from a visiting bookmobile (Wild About Books), and a warm-and-fuzzy tribute to the deep blue sea (Wonder Water Web). Of course, there’s no shortage of more serious fare—but at least the festival’s organizers understand the need to save a sense of humor as well.

The festival runs to Friday, March 22, at various venues; see dcenvironmentalfilmfest.org for a complete list of films, venues, and prices. (202) 342-2564.