VERGE, Cities

Sadhu Johnston shares why "cities are engines of innovation"

Johnston, author of "The Guide to Greening Cities" and a founder of the Urban Sustainability Directors Network, sees promise in the buregoning movement to make cities more environmentally sound, despite challenges with program inundation and leadership hurdles. "More and more, what you're seeing is cities stepping up and making the commitment to change the way we impact the environment," he told Shana Rappaport, director of engagement for VERGE.