The US Green Building Council released their ranking of states according to their LEED Green Building development. The per-capita list is based on 2010 U.S. Census data and includes commercial and institutional green building projects that were certified throughout 2013.
Illinois is number one, certifying 171 projects representing 2.29 square feet of LEED space per resident. Maryland and Virginia follow at numbers 2 and 3.
LEED stands for Leadership in Energy and Environmental Design