The Home Energy Efficiency Team wants to use thermal energy from Massachusetts' Merrimack River to heat homes, an alternative to natural gas.

The Moran Frame project in Burlington, Vt., will turn a shuttered coal plant into a 65-foot-high public art piece that symbolizes the city's energy story.

New York state and its utilities are funding a $700 million program to support EE and building electrification, mainly through heat pump technologies.