cob is a building material consisting of clay, sand, straw, water, and earth, similar to adobe (language via Wikipedia). It is considered a green building material because it relies solely on local material and requires very little energy to produce.
Farr Associates office space is an example of green design and historic preservation working together. Located in the 3,200 sf. in the historic Monadnock Building, Farr’s office was a LEED® for Commercial Interiors pilot project and is currently applying for the final certification.