According to Associated Press reports in the Boston Globe, Maine is the only state in which 100 percent of the electricity used in state-owned buildings comes from renewable sources. In fact, those green, non-fossil power sources include a dam on the Androscoggin River, wind, solar and geothermal power, and power from municipal waste generators.

"Most other states with green power purchasing requirements for state buildings set minimums of anywhere from 3 to 20 percent, according to an energy researcher for the National Conference of State Legislatures."

As noted in the article, Connecticut is the next closest with goals of 20 percent renewable-energy purchases in 2010 raising to 50 percent in 2020 and 100 percent in 2050.

Supporters comment that using renewable energy will reduce global warming, offset greenhouse gas emissions and save taxpayers money. According to reports, the renewable energy credit purchase displaces about 20,000 ton of carbon dioxide emissions per year, the equivalent of taking about 2,400 cars off the road.

To read more about Maine's greening initiatives, click here.