Can a neighborhood be too walkable?

Walk Score is an increasingly popular tool for measuring the livability of a neighborhood. But maybe more people would warm to the idea of density if it weren't quite so -- dense.

U.S. homes are right-sizing and greening

Are McMansions going the way of the Hummer? Not entirely, Kaid Benfield suspects, but he does think demand for them is dropping.

High-speed rail too expensive? Let’s go with bullet-speed buses [VIDEO]

President Obama's proposed high-speed train system will be replaced with a fleet of buses that will rocket along highways at speeds up to 165 mph (according to The Onion).

Bicycle vendors can help bring dead urban spaces to life

In China, peddlers who pedal sometimes improve poorly planned streets.

Young greens, old greens, and cities

San Francisco Chronicle columnist John King has a smart piece on the "generation gap" between old-school environmentalists suspicious of urban development and younger greens who see density as essential.

A Tokyo house built on a piece of land the size of a parking space

In Japan, the trend toward tiny homes is driven by harsh economic reality more than any desire to live "sustainably." It's a good example of how people can adapt to a world of diminishing resources -- the same world we …

9 things I learned by shadowing a home-energy inspector

Everyone knows that weatherization is the super-duper-est economic policy ever. But forget policy for a moment. Let's look at how it works out in the real world.

Driver kills boy on bike, sues boy's parents

A man convicted of manslaughter after hitting a 14-year-old boy with his car is now suing the kid's parents because they didn't make him wear a helmet.

Moving to the suburbs for your kids? Think again

Folks, if you live in a sprawling, autocentric community that requires you to drive your kids to the supermarket to buy their organic produce and to the local playfield to get their exercise, you're not doing them -- or the …