 FRAMINGHAM, Mass. SUMMERVILLE, S.C.--BUSINESS WIRE-- cleanenergy--Ameresco, Inc. NYSE: AMRC, a leading cleantech integrator specializing in energy efficiency and renewable energy, today announced that it is entering into a joint venture with Hannah Solar Government Services HSGS, a Service-Disabled Veteran-Owned Small Business SDVOSB renewable energy company. The joint venture was facilitated as part of the SBA Mentor Protégé Program, which helps eligible small businesses, known as protégés, gain e 