Boston is one of the oldest cities and is the capital and most populous city of the Commonwealth of Massachusetts in the United States. It has become the latest city to commit to running on 100% renewable energy. Its plenty of museums, historical sights and abundance of live exhibitions for these reason the city gets 16.3 million visitors a year, making it one of the ten most prominent visitor areas in the nation. Boston is surrounded by the "Greater Boston" region. Boston is sometimes called a "city of neighborhoods" as a result of the bounty of differing subsections; the city government's Office of Neighborhood Services has authoritatively assigned 23 neighborhoods. Boston has a humid continental climate. Boston's schools and colleges apply a huge effect on the territorial economy. Boston pulls in more than 350,000 understudies from around the globe, who contribute more than US$4.8 billion every year to the city's economy. Boston has been known as the "Athens of America" for its abstract culture, procuring notoriety for being "the scholarly capital of the United States."