March 18, 2014, BY Kathryn Kopchik

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The 2012 documentary, "Lost Rivers," will be shown Tuesday, March 25, at 7 p.m. at the Campus Theatre in Lewisburg.

The film is co-sponsored by the Bucknell University Environmental Center's Green Screens film series and presented as part of the University's ongoing Film/Media series.

Admission is $2 per person; Campus Dollars are accepted. The Campus Theatre is located at 413 Market St. in Lewisburg.

Centuries ago, most major cities were built along rivers; but as the population grew, polluted rivers became conduits for deadly waterborne diseases like cholera. The typical 19th-century solution was to bury rivers underground and merge them with sewer networks.

Directed by Caroline Bâcle, "Lost Rivers" retraces the history of these hidden urban rivers by delving into archival maps and going underground with clandestine urban explorers. The team searches for the Petite Rivière St-Pierre in Montreal, the Garrison Creek in Toronto, the River Tyburn in London, the Saw Mill River in New York and the Bova-Celato River in Bresica, Italy.

Benjamin Hayes, director of the Susquehanna River Initiative at Bucknell University's Environmental Center, will introduce the film.

The final spring Green Screens film is scheduled for April 22. "Switch: Discover the Future of Energy," explores the shift from coal and oil to the energies of tomorrow. Documentary filmmaker Harry Lynch and geologist Scott Tinker travel the world to discover how it most likely will happen, rather than discussing how it should happen. Dina El-Mogazi, director of the BUEC's Campus Greening Initiative, will introduce the film.