Roof space can be a lovely amenity in a co-op or condo, but it can also be used for solar to reduce your building’s carbon emissions. Tina Larsson, co-founder and CEO of the Folson Group, a business consultancy for co-op and condo boards, shares how an Upper East Side co-op in Manhattan managed to do both by making every square foot count. Tina Larsson is interviewed by Bill Morris for Habitat Magazine.