The new building is designed to be a Living Building Challenge (LBC) building, but before it gets certified as such, it must complete a performance year in which it operates as a net-zero energy and net-zero water building. The seven “petals” and twenty “imperatives” that buildings must meet to be LBC certified also include stringent materials guidelines that stipulate minimal negative impact on human and ecosystem health as well as supporting local and regional manufacturers. So far only eight buildings have completed their performance year and are LBC certified. The Environmental Center, which combines a historic building and a newly built structure will likely become the first historic campus renovation LBC building. The historic building – Kellogg House – was the home of the first four Williams College presidents and has moved four times. –Williams College