The Lorax of the local gallery scene, Warehouse’s “The End of Nature” takes a cynical look at a future Earth without flowers and trees. The natural world has been a source of artistic inspiration from the earliest cave paintings to the Hudson River School, but when climate change erases it, artists will have to rely on simulated greenery. The artificial nature portrayed in the exhibit is deeply disturbing. Matt Hollis’ “Last Stand,” a three-legged creature made of silk flowers and artificial green fur is like an alien float in the Rose Bowl Parade. Mark Osele’s “RoboBuck” and “MechaniCarp” are big-game trophies mounted on plaques—but made of a child’s Erector kit. Taking a political stance, Ruth Trevarrow’s “White House China” set of animals painted on plates references the abysmal record of the Bush administration in protecting endangered species, while Linda Byrne and Luis Castro both offer a future bird’s nest, the former made of soda-can rings, the latter of stone. The exhibition is on view from 1 p.m. to 5 p.m. Saturdays and Sundays, to Sunday, May 4, at the Warehouse Gallery, 1019 7th St. NW. Free. (202) 783-3933.