As we continue to engage government executives who are changing the way government does business, we had the pleasure of taking The Business of Government Hour on the road to a variety of U.S. cities. New York City, perhaps more than any other, represents a complex ecosystem that requires and consumes a vast array of natural resources. Protecting such resources and the environmental health and welfare of its residents is essential for the City—for all cities to exist and thrive. We spoke with Cas Holloway, commissioner of the NYC Department of Environmental Protection (DEP), about his efforts in this area that includes an overview of the City’s water system, how the City ensures its water system is viable for the next 100 years, innovative ways of managing a major capital construction portfolio, NYC’s sustainability efforts, and protection of its watersheds.