A trio of House lawmakers from both parties rolled out legislation this week designed to prevent Fannie Mae, Freddie Mac and their regulator from blocking state and local clean energy initiatives that allow homeowners to install green upgrades.PACE, or property-assessed clean energy, programs enable local governments to finance renewable energy and energy efficiency projects such as solar panels, insulation and water conservation systems for their homes and commercial buildings. The financing is paid for by raising the individual homeowner’s tax.