From GlobeSt.com: "20 M St. SE, a 190,000-sf office building developed by Lerner Enterprises and designed by WDG Architecture, has been awarded LEED Gold certification--the first in the city to achieve this certification level for Core & Shell Development, according to the US Green Building Council. [...] Green features include roofing that reduces heat island effects, plumbing fixtures that reduce water consumption, high-efficiency HVAC systems and humidity control, extensive use of recycled materials and locally manufactured products, low-emitting paints, carpet, adhesives, and sealants, monitoring systems for environmental comfort, advanced stormwater management measures and easy access to public transportation." The blurb also states that 20 M is expected to be 50 percent occupied by the end of the year. But so far, no tenants have been announced. (Although perhaps Wachovia's moves toward opening a branch at 20 M hint toward some tenants coming soon.) 20 M is the big silver building at Half and M, visible to most everyone in the upper decks at the ballpark.