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By JAIMEE FRANCIS

Heat pumps, which use electricity rather than directly burning fossil fuel, are a key piece of Massachusetts’ goal of reaching net zero greenhouse gas emissions by 2050. But the state has hit only 1% of its installation target, in large part because...

By ALEXANDER MACDOUGALL

NORTHAMPTON — When Brien Baker was teaching English in Japan during the 1980s, he heard a story about a colleague that witnessed a student buy an 8-ounce can of soda from a vending machine, even though a 12-ounce soda cost the same price. When the...