No one had to twist Robert Redford's arm to get him to narrate an IMAX film about a Grand Canyon river trip.
Redford, a lifelong environmentalist, previously navigated the Colorado River and has a boat on Lake Powell. He worries about water conservation as a drought threatens the region — and, visibly, the Colorado.
"(The river is) endangered now on a number of fronts," Redford said by phone Monday from his office in Park City.
"Its volume is shrinking because of a megadrought cycle that's now facing the Southwest, and some scientists predict that it could last into the next century," said Redford, who referred to a recent study forecasting that lakes Powell and Mead — another vital storage reservoir on the Colorado — could dry up in the next 13 years amid climate change and increasing demand for water.