The ninth annual edition of the State Energy Efficiency Scorecard, released by the American Council for an Energy-Efficient Economy (ACEEE), once again ranks Massachusetts as the top state with California a very close second.

Energy efficiency has made major strides in the U.S. in the last 35 years, with “energy intensity” — energy used per dollar of gross domestic product — down from 12.1 thousand Btu per dollar in 1980 to 6.1 thousand Btu per dollar in 2014, according to a new report from the American Council for an Energy-Efficient Economy (ACEEE).

Johnson Controls plans to scale up its program to help small and medium-sized suppliers reduce energy use in their manufacturing facilities as a Clinton Global Initiative America (CGI America) Commitment to Action.

Boston is the most energy-efficient city in the United States, according to the second edition of the City Energy Efficiency Scorecard, released by the American Council for an Energy-Efficient Economy (ACEEE).

The rankings are modeled on ACEEE’s time-tested approach to energy-efficiency ranking of U.S. states, and includes 16 of the world’s largest economies.