The empty storefront at 912 Main St. was once a restaurant called Scarlet O’Hara’s that was gone with the wind years ago.

The 2,200-square-foot space will have new life this fall, when National Grid opens the Sustainability Hub, which will offer innovative energy solutions through hands-on demonstrations of “smart” meters, interactive displays on smart grid technologies and tips for how consumers can manage and reduce energy use. Clark University is donating the space.

National Grid President Marcy Reed, Clark University President David Angel, Secretary of Energy and Environmental Affairs Richard K. Sullivan Jr. and city officials came together at a May 16 press conference to announce the Hub’s arrival in the neighborhood. Read more.