How do you reduce noise in one of the loudest cities in the world?
Do NYC urban planners have infrastructure and environmental advice for slum-filled cities in other parts of the world?
An EPA competition launched with 14 participants in 2010. Now 3,300 buildings are competing, with some unusual entrants in the metro region.
Traffic engineer Sam Schwartz explains why he's optimistic about the future of transportation in NYC.VIDEO
Solar and wind power in private buildings have a give-and-take relationship with the electric grid.
Former Mayor Ed Koch has called for closing the aging nuclear plant in Westchester County, saying it poses a danger to the 8 million people who live 24 miles to the south in New York City – especially in the wake of what was learned from the Fukushima disaster.