The use of small generating resources to maintain reliability during peak demand periods can increase air emissions, and such use can coincide with periods of unhealthy air quality. Demand response solutions that include both supply-side and demand-side resources can assure reliability, reduce customer costs and improve air quality. ISO-NE’s demand response program is discussed as one way in which energy and air quality regulators worked together to help to improve reliability and avoid the need to operate high emitting small engines. The webinar was attended by 76 air and energy officials from around the United States.