Copenhagen has done a remarkable job creating streets that are focused on bicycles and pedestrians.

Copenhagen has done a remarkable job creating streets that are focused on bicycles and pedestrians.

Cities generate most of the global economy, and most of its energy use, resource demands and climate emissions. How we build cities over the next decades will largely determine whether we can deliver a bright green future.

The denser places get, the lower the amount of energy people use to get around it.

If mass media, social isolation in the suburbs, alienating workplaces and long car commutes create a bunker mentality, the Internet does the opposite.

In almost all city governments in America, the small group of people who don't want change are able to block change.

There’s more to being an environmentalist than occasionally signing an online petition and mailing your check to the Sierra Club. Really the most effective environmental actions you can take have to do with crafting your home and surroundings, your workplace decisions and your investment habits.