LAS VEGAS — Vice President Joe Biden cited John F. Kennedy's famous "moon" speech as a reason to invest in renewable energy during his keynote address at the National Clean Energy Summit.

"Clean energy is today's space race," Biden said during his speech. "The march into the future will continue whether or not we participate."

Biden's "space race" reference comes at a time when the Obama administration has called for NASA to shelve all future manned-moon missions as part of his proposed budget cuts.

In addition to citing Kennedy, Biden cited numerous technological advancements such as iPhones and e-readers to encourage further renewable energy development.

Biden's speech followed a five-person panel discussion featuring summit-sponsor MGM Resorts International's CEO, Jim Murren.