Energy Efficiency

Driving Is Actually Less Energy-Efficient Than Flying

A revealing comparison in how we've come to use two very different modes of transportation.

Most Americans Don't Realize Incandescent Light Bulbs Are About to Disappear

And many of those who do are planning to stock up on 40 and 60 watt bulbs.

Los Angeles Bans Heat-Sucking Roofs

From now on, the city's building code will require new residential construction to include "cool roofs" capable of reflecting sunlight.

How Energy Efficient Is Your City?

A new report ranks 34 major U.S. cities by their energy-use policies.

Where New Yorkers Run Up the Biggest Power Bills

And where they pay the heaviest price for it.

What Math Can Tell Us About Technology's Spread Through Cities

What if city officials really understood how solar panels catch on?

4 Out-There Designs to Cut the Carbon Footprint of Heated Sidewalk Cafés

SolarFloors, Urban Parasols and infra-red under-table heating.

The Case Against Saving Midcentury Office Buildings

A new report suggests it would be better for the environment to tear them all down.

Energy-Efficient Homes Are Much Less Likely to Go Into Default

Should federal mortgage guidelines take this into account?

The Streetlight of the Future Will Do So Much More Than Light Your Street

It could also catch criminals, broadcast WiFi and... detect meth labs?

A Vision of a Carbon-Zero Urban Future: An Interview with Alex Steffen

How the world's wealthiest cities can beat back climate change.

This House Consumes Less Net Energy Than Your Little Urban Studio

Meet the federal government's four-bed, three-bath, two-car garage, 2,700-square foot suburban net-zero home.

New Research Finds Urban Form Plays Little Role in Sustainability

The compactness of cities may not be a determining factor when it comes to energy use.

The Secret Energy Drain on Cities: Streetlights

San Diego County has made it easy for its cities to convert to energy-efficient streetlights.

Greening an Entire Block Instead of Just One Building

Most smaller commercial buildings can't afford energy retrofits on their own. But what if they banded together?

The Real Reason Cities Can Be So Much Greener Than Other Places

How the urban 'network' allows residents to live more efficiently at a number of levels.

Why the Most Environmental Building is the Building We've Already Built

A new report suggests that retrofitting is almost always more energy efficient

Telling Builders to Build Greener Without Saying How

Seattle tests a code that would allow architects to decide how to best reduce energy waste

Fostering Sustainability in Houston

City programs slowly turn an oil city green