The Clinton Hill Cooperative in Brooklyn has reduced its gas use by 50% since 2017 and is compliant with Local Law 97 until 2029, thanks to a master plan of energy-efficiency upgrades, including steam trap replacements, window replacements, smart sensors, and radiator covers, which were paid for out of the co-op's capital reserves without the need for an assessment. (Print: A Four-Pronged Solution Slashes Gas Bills In Half)