Photo gallery

McHugh and his wife, Linda, sailing in Nantucket Sound off South Chatham, Mass.

Photo 1: SPRI and ORNL completed a study in 2010 showing vegetative roof systems can help reduce heat gains and losses, resulting in significant energy savings in mixed climates. The photo shows plant coverage of a 4-inch-deep vegetative roof system.

Photo courtesy of SPRI and Oak Ridge National Laboratory, Oak Ridge, Tenn.

Photo 2: SPRI is developing codes and standards regarding vegetative roof systems.

Photo courtesy of GAF Materials Corp., Wayne, N.J.

Aerial views from the East of Orlando Hilton Convention Center

Photo courtesy of Hartford South LLC, Orlando, Fla.

Aerial views from the West of Orlando Hilton Convention Center

Photo courtesy of Hartford South LLC, Orlando, Fla.