Small hydropower projects have the potential to bring electricity to millions of people now living off the grid. But experts warn that planners must carefully consider the cumulative effects of constructing too many small dams in a single watershed.
August 7, 2014
A move by New York City to begin collecting food scraps and other organic waste is just the latest example of expanding efforts by municipalities worldwide to recycle large quantities of unused food and slash the amount of material sent to landfill
August 8, 2013
Urban stormwater runoff is a serious problem, overloading sewage treatment plants and polluting waterways. Now, various U.S. cities are creating innovative green infrastructure — such as rain gardens and roadside plantings — that mimics the way nature collects and cleanses water.
January 29, 2013