Many D.C. landlords pride themselves on having environmentally friendly buildings, and now they can boast that their city is the greenest in the world.

The U.S. Green Building Council Thursday named D.C. the first LEED Platinum city in the world.

Known for its LEED building rating system, the USGBC last year launched LEED for Cities, measuring outcomes of citywide sustainability efforts. Its metrics include energy; water; waste; transportation; and human experience, which includes equity, prosperity, education, health and safety.

D.C. has more LEED certified square footage per capita than any state in the country. It also has the second-most total LEED-certified buildings of any city, and the country's first LEED certified Major League Baseball stadium, Nationals Park.

The District has a total of 858 LEED certified commercial projects totaling 153M SF and 546 LEED certified residential projects totaling 6,418 units.