Municipal options for sustainable energy are rapidly expanding as new technologies are developed and new companies come to market with solutions.

The Interstate Renewable Energy Council (IREC) is a non-profit organization dedicated to moving renewable energy resources into the marketplace. IREC emphasizes education and outreach, stakeholder coordination, technical assistance, workforce development, the adoption and implementation of uniform guidelines and standards, consumer protection and building networks to share experience and information.

The Green Power Network provides detailed information about green power companies, new green products, consumer protection issues, and governmental policies affecting green power markets. The web site is operated and maintained by the U.S. Department of Energy.

The American Solar Energy Society (ASES) is a non-profit organization dedicated to increasing energy efficiency and the use of solar energy and other sustainable technologies in the U.S. ASES has 23 chapters across the country.

The Northeast Sustainable Energy Association is the Northeast's leading organization of professionals working in sustainable energy, whole-systems thinking and green technologies.

Renewable Funding develops and delivers innovative solutions for renewable energy and energy efficiency financing. There is no cost to participating cities.