CNN

As part of a plan to utilize the city's rainwater and recycle it back to lake Michigan, Chicago has been renovating its 13,00 alleys to become permeable surfaces, where rainwater can soak back into the ground. 40 alleys have been redone so far.

CNN reports on the growing chaos in suburbs emptied by the mortgage crisis, and what they tell us about the future of the American dream.

As walkable urban communities become the neighborhoods of choice, are suburban subdivisions destined to become twenty-first century slums?

Big city mayors testifying before a Senate committee are asking for more federal infrastructure investments, but admitted that even the $1.6 trillion estimated by the American Society of Engineers wouldn't be enough.

Housing groups in Katrina-affected regions are expressing their outrage after a CNN investigation uncovered that tons of supplies intended for hurricane victims sat in storage for two years before being given away to cities and other organizations.

An outreach counseling group in Santa Barbara, California, has worked with the city to set up 12 parking lots where people can sleep in their cars at night -- an act that is illegal on city streets.

The top Republican on the House Transportation and Infrastructure Committee is leading a bill to fund new high-speed rail, stating he's ready to fight the air travel lobby that has traditionally opposed plans for high-speed rail.

This video from CNN looks at a home being planned in Connecticut that will have 26 toilets.

Technological issues with the handheld computers to be used in the U.S. Census Bureau's 2010 Census have frustrated officials and have them considering a plan to return to the traditional paper and pencil counting method of years past.

The mega cities of the developing world are expected to experience increasing rates of growth in the coming decades. The growth in population will be a challenge, but so will be dealing with the increase in air pollution.

The increasing populations of the world's cities have a large impact on energy use and global warming. These populations should be a major focus of efforts to address climate change, according to this article from CNN.

The actor-turned-developer announced plans to build 150 environmentally-friendly homes for low-income families in New Orleans's Lower Ninth Ward.

The latest report on America's most dangerous cities has been released, and Detroit is once again at the top. Critics are bashing the study, saying the FBI crime statistics it is based on do not tell the whole story of each city.

A barber shop owner in Clarksville, Tennessee shot and killed himself in front of the City Council after members voted against his request to rezone his home as commercial property.

While the ailing Fidel Castro remains behind the scenes in Cuba's governing, his brother Raúl has earned popular praise for putting various quality-of-life projects on the fast track.

The landfill on the island of Pulau Semakau is designed to store the waste from the city-state of Singapore while preserving the ecological health of the surrounding environment.

A privately-financed campaign allows web visitors to vote for the "New 7 Wonders" of the world.

This CNN video report looks at an Atlanta city councilperson's proposal to fight back against McMansions and limit the size of houses.

The winners of last year's Defense Advanced Research Projects Agency (DARPA) artificial intelligence road race claim that they'll have a car ready to navigate urban traffic in less than a year.

London's mayor takes on the traffic challenge by expanding his congestion pricing experiment into West London -- an area with posh shopping areas and celebrity townhouses.