NEW YORK — 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 Utah resident and lifelong environmentalist, previously navigated the Colorado River and has a boat on Lake Powell. He says he's worried about water conservation as a drought threatens the region.
The issues affecting the river are addressed in ''Grand Canyon Adventure: River at Risk 3D,'' which opens nationwide Friday.
The film follows environmental activist Robert F. Kennedy Jr. and anthropologist Wade Davis and their daughters as they explore the river with American Indian guide Shana Watahomigie. It features music by the Dave Matthews Band.
