Ward 2 Alderman Maryann M. Heuston got a firsthand look at the rapidly developing expansion site for Greentown Labs, their Global Center for Cleantech Innovation.

By Jim Clark

Back in 2011, a small group of like-minded MIT graduates decided to establish a facility where they could keep building their engineering prototypes.

Since then, more than 100 startup companies have been incubated at Greentown Labs in Somerville, where they have collectively created more than 500 jobs and raised over $200 million in funding.