Who scuttled documentary about Mississippi River pollution?

The University of Minnesota has abruptly canceled the premiere of a film about the dead zone in the Gulf of Mexico. The film focuses on pollution from farms, golf courses, and other sources in Minnesota and throughout the course of the Mississippi River. And it offers solutions to the problems.

The film was scheduled to air on Twin Cities Public Television in early October, but the director says she was notified last week that the university's public relations office had canceled the air date.

Host Tom Crann talks to MPR Environmental reporter Stephanie Hemphill about the controversy, which was originally reported by the Twin Cities Daily Planet.