"Refuge At Risk," a slide show and lecture about the potential threats to Alaska's Arctic National Wildlife Refuge, will be presented 7:30 p.m. Friday at the University of Utah.

The program is part of the Sierra Club's commemoration of the Exxon Valdez oil spill, in events called "Alaska Awareness Week." Tickets cost $4but students can get in for $2. The program will take place in the U.'s Behavioral Sciences Auditorium.Jonathan Waterman, author of "High Alaska" and "Surviving Denali," will display kayaking, rafting and hiking slides that he took during his trips to the refuge.

"The slides highlight the biological diversity and national significance of this arctic habitat," said Christine Osborne of the club.

She said the refuge is threatened by proposed oil drilling and related developments that would destroy its ecological integrity.

Rudy Lukez, conservation chairman for the club's Utah Chapter, called the refuge "the Yellowstone of the Far North."

The Arctic National Wildlife Refuge is "a remarkable, untouched wilderness which would be lost forever" if oil development is permitted of the type that leads to disasters like the Exxon Valdez tragedy, he said.