Washington, D.C. — Building on President Obama’s call in the State of the Union address earlier this week for a new era for American energy, U.S. Energy Secretary Steven Chu joined with Houston Mayor Annise Parker today to announce that Houston, Texas is joining the Better Buildings Challenge. Houston is the latest community to join the Challenge, a public-private partnership that seeks to improve energy efficiency 20 percent by 2020 in commercial, government, and school buildings across the country.