GreenHomeNYC | 1,425 followers on LinkedIn. Promoting an energy efficient and sustainable built environment, and supporting green professional development in NYC. | GreenHomeNYC is a community-oriented, volunteer-run organization. Since 2002, our mission has been to promote an energy efficient and sustainable built environment, and to support green professional development in New York City. Our 501(c)3 non-profit organization provides sustainability information to the general public, and technical education to advance sustainability careers through a diverse array of programming, events, peer-to-peer mentoring and networking opportunities.