U.S. Energy Secretary Steven Chu said on Friday that the United States needs to come up with a better system for storing or disposing of radioactive nuclear waste than a planned repository near Las Vegas.

“The president has made it very clear that we are going to go beyond Yucca mountain. You should go beyond Yucca mountain,” Chu said. “But instead of wringing my hands, let’s go forward and do something better.”

The Obama administration, in January, announced it was stopping the license application for a long-planned multi-billion dollar nuclear waste storage site at Yucca Mountain near Las Vegas, which is opposed by environmental groups.