Much like their human counterparts inside, butterflies and bees flutter and rush around on the rooftop garden of the Hipolito F. Garcia Federal Building and U.S. Courthouse.

The green roof is the centerpiece of a $56 million renovation of the 75-year-old building, the “greenest” owned by the U.S. General Services Administration. It is the first GSA building to earn platinum – the highest – certification for new construction, categorized that way because the work was so extensive in its category from the U.S. Green Building Council under its Leadership in Energy and Environmental Design rating system.

To learn more on the new Federal Building, visit chron.com.