December 22, 2015, 9am PST
Juneau, Alaska's tiny capital city, is not accessible from elsewhere by road. Its isolation makes waste disposal problematic and expensive, spurring an aggressive recycling effort.
February 28, 2013, 11am PST
Houston's 14 percent recycling rate is downright dismal (San Francisco's is 80 percent). The city's entry in the Bloomberg Philanthropies' Mayor's Challenge seeks to change this by taking the onus off of individuals to decide what's recyclable.
April 17, 2010, 1pm PDT
Clean-tech incinerators are making their way into Danish neighborhoods. Why is the U.S. not implementing this technology? Environmental groups hate them, and land fills have been abundant.
October 27, 2008, 6am PDT
A project to transform a municipal landfill into a terraced landscape wins high honors at the 2008 World Architecture Festival in Barcelona, Spain.