The Class of 1966 Environmental Center at Williams College is offering tours of the building for the community from 4 to 6 p.m. Wednesday, Aug. 3. Light snacks will be offered. Children are welcome.

The Environmental Center, which opened last fall after a renovation and expansion, is the centerpiece of campus-wide sustainability efforts.

The college is aiming for the center to be certified as a Living Building. To do so, the Environmental Center must demonstrate over the course of a year that it can perform as a net-zero energy and net-zero water building.

The center's design maximizes space and minimizes energy and water demand. It uses on-site solar energy and rooftop water collection to produce 100 percent of the energy and water required for its operation.

More than a third of the site is used for organic food production of berries, fruit trees, annual and perennial vegetables, and herbs.