Registration is now open for the U.S. Green Building Council's (USGBC) annual Greenbuild International Conference and Expo. Taking place this year in San Francisco, Calif. at the Moscone Center, Greenbuild is the world's largest conference and expo dedicated to green building. Record attendance of 35,000 is anticipated from across the green building sector, spanning commercial and residential professionals, architects, building owners and operators, students, advocates and educators.

"We are thrilled to bring the energy of Greenbuild to San Francisco, home to some of the world's leading minds in both sustainability and technology," said Kimberly Lewis, Senior Vice President, Community Advancement, Conferences and Events, USGBC. "Greenbuild is the nexus of the sustainability movement where we celebrate collective successes, share our knowledge with one another, and challenge the status quo. This year, Greenbuild is raising the bar higher than ever."

USGBC today announced that Mika Brzezinski and Joe Scarborough, co-hosts of MSNBC's weekday morning show "Morning Joe," and Biz Stone, co-founder of Twitter, Inc., will headline the Greenbuild opening plenary celebration, the official Greenbuild kick-off event on Wednesday, Nov. 14, 2012 at the Moscone Center in San Francisco.

"Sustainability is everywhere, and no longer is it an option for companies and individuals to ignore their footprints," said Biz Stone, co-founder of Twitter, Inc. "Collectively, we can make a profound social and environmental impact. I look forward to the ensuing discussion among the innovative crowd at Greenbuild."

The announcement of Stone, Brzezinski and Scarborough at Greenbuild is the first of many Greenbuild 2012 speaker announcements to come. Previous keynote speakers have included Thomas Friedman, Cokie Roberts, Ret. Gen. Colin Powell, Archbishop Desmond Tutu, Al Gore and President Bill Clinton.

Greenbuild 2012 will feature three days of networking, educational sessions, green building tours, master speakers and plenary events. The expo hall will be the biggest in Greenbuild's 11-year history, with three floors and more than 1,000 exhibitors and 2,000 booths featuring the latest technological innovations and cutting edge products. This year's show will celebrate bringing technology and sustainability together in the global green movement. For more information on Greenbuild 2012,, follow@Greenbuildon Twitter and tweet hashtag #Greenbuild to join the conversation.