Clinton library goes platinum

The environmentally friendly library named in honor of former President Bill Clinton is even more sustainable these days, just a few years after the $165 million building opened its doors to the public.

According to The Associated Press, the William J. Clinton Presidential Library and Museum recently underwent a transformation. Once bare concrete, the structure’s roof is now home to various types of greenery, including grass, roses, ferns and strawberries. The plants will help insulate the library and will collect and use rainwater.

Opened in 2004, the building earned a silver rating under the Leadership in Energy and Environmental Design standards established by the U.S. Green Building Council. Eco-friendly features, such as solar panels and electric-car charging stations, helped establish the distinction. Earlier this month, due to continued sustainable practices, the LEED rating got bumped up to the platinum level.