New York City’s government has achieved a remarkable drop in greenhouse gas emissions. A new report shows that the city’s municipal operators are using less energy and emitting less carbon than they were twenty years ago. In fact, while greenhouse gas emissions around the world continue to climb, New York’s governmental emissions have dropped a stunning 31 percent since 2006, reaching their lowest level in decades. This remarkable achievement comes thanks to several different policy approaches to making New York City greener and…