Cities

Critical List: Operators say the grid can handle the heat; green tech investment down

Grid operators say they're ready to handle the extra load that air conditioners and other cooling devices will put on electricity supplies during the heat wave. Venture capitalists invested less money on green tech projects last quarter; they're hot on …

When design kills: The criminalization of walking

A child is struck by a driver and killed when crossing the street on foot with his mother -- and she is the one who is charged with vehicular homicide. Why is normal, instinctive pedestrian activity criminalized?

Announcing this year's most walkable cities

Walk Score has announced its 2011 list of most walkable cities, with a twist -- this year there's also a "fan favorite" category, where you can vote for what city you think is the easiest to navigate on foot.

'Solar highways' transform our crumbling infrastructure into something useful

Okay, we know YOU ride your bike everywhere. But the country’s 4 million miles of roads, and 50,000 miles of interstate highway, probably aren’t going anywhere any time soon. Isn’t there anything productive we can do with this giant car …

Toilet 2.0 will turn waste into energy, fertilizer, and clean water

Think poop is funny? Well, it’s DEADLY SERIOUS. Here are the unsavory facts about poor sanitation infrastructure, according to the Gates Foundation: 2.6 billion lack access to safe toilets. Food and water that's come in contact with waste leads to …

Erasing hate speech from public spaces [VIDEO]

One 66-year-old German woman has made it her mission to remove and obliterate neo-Nazi, homophobic, and racist graffiti. Watch "The Hate Destroyer" in action.

Urban gardens: The harvest is not just food, it's community

Community gardens have an almost magical power to change the urban landscape. Now many in New York City are safe in the hands of those who tend them.

North Korea runs on wood-burning trucks

If you've ever wondered what we'll do after we've run out of cheap oil, other than eat each other, you have only to look to the Democratic People's Republic of Korea, a.k.a. North Korea. Ever since the shipments of crude …

NYPD puts 50 Chevy Volt cruisers on the streets

The next time you're sitting in the bus lane, humming "Don't pull me over Mr. Officer" as NYC's finest ambles up to your window to ask for your license and registration, check your rear-view mirror. If you're lucky, you can …