CNN.com

Even as SUV sales have dropped 33% this year, some drivers hang on to their gas-guzzlers. "You've got to have that room when you're moving around," says a Georgia man. The cost of switching is another major factor for families.

The city's strained infrastructure can't handle the forecasted growth, say experts. To remain globally competitive, the city is faced with the challenge of major upgrades.

CNN's Dr. Sanjay Gupta takes a look at several New Urbanist communities changing that are encouraging walking and physical activity.

Reflecting the power of market price signals in influencing behavior, the average American traveled fewer miles behind the wheel in 2005 -- the first time in 25 years.

A citywide 'lights out' organized by environmentalists as a protest against the city's poor air quality failed to generated enthusiasm from residents or support from officials.

Home sales dropped in November by the largest percentage since 1994. Is this the beginning of the end for the real estate bubble?

Twelve years after a government initiative to address environmental injustices, AP analysis of government pollution, health and census data suggests that little has changed.

The front shape of sport utility vehicles puts pedestrians at greater risk of injury on impact.