Massachusetts is #1 in energy efficiency.

31 Solar Photovoltaic Panels in Hinesburg, Vermont
Robert Nicklesberg, Getty Images

For the fifth year in a row, Massachusetts tops the list as the most energy efficient state in the country. reports that the American Council for an Energy-Efficient Economy voted on the commonwealth based on what they claim to be a "strong commitment to energy efficiency under its Green Communities Act".

Vermont was voted #3, Rhode Island #4 and Connecticut #6.