Environmental wonks will party Thursday evening in the nation’s most environmentally-friendly museum.

The Rocky Mountain Institute, a nonprofit energy-efficiency consultant that works with San Francisco, is holding a symposium in The City “to discuss the most challenging questions of our time,” according to the event website.

On Thursday evening, after the first day of the symposium, Rocky Mountain Institute staff will party at the California Academy of Sciences to celebrate the one-year anniversary of the rebuilt super-green museum.

Tickets to join in the fun cost $12.