The green roof at the Packard Foundation Headquarters. The project design team includes the Integral Group, EHDD, Tipping Mar, and many other consultants. (Photo courtesy The David and Lucile Packard Foundation)

The green roof at the Packard Foundation Headquarters. The project design team includes the Integral Group, EHDD, Tipping Mar, and many other consultants. (Photo courtesy The David and Lucile Packard Foundation)

The green roof at the Packard Foundation Headquarters. The project design team includes the Integral Group, EHDD, Tipping Mar, and many other consultants. (Photo courtesy The David and Lucile Packard Foundation)