LAS VEGAS (AP) — Former Secretary of State Hillary Rodham Clinton said Thursday the U.S. should become what she called the world’s 21st-century clean energy superpower, during remarks resembling both a campaign speech and a call to action at the annual National Clean Energy Summit in Las Vegas.

Clinton cast the threat of global climate change as real, and “the most consequential, urgent, sweeping collection of challenges” faced by the nation and the world.