New York City is the only city in the US that never sleeps.  It is also one city that often smells, especially in the summer.  One reason is the city’s aging sewage system, to which the city’s 8 million residents contribute 1.3 billion gallons of wastewater daily. All that wastewater goes through several processes until [...]

More than 20 years ago, Mayor Richard M. Daley had a vision of a green Chicago, from trees and roofs to green buildings and alleys. While on a visit to Germany in the late 1990s, he saw a green roof on Hamburg’s City Hall and sought to replicate the idea in Chicago. He wanted the [...]