Energy Efficiency

6 energy-saving portable electric space heaters

Even at 100, San Francisco City Hall couldn't be greener

Breathe easy: Clean-burning wood stoves are on the way

How to fight climate change: Invest in inner cities

Life Cycle Analysis doesn't budge outcome of the great dishwasher debate

Why dishwashers are greener than washing by hand

Vampire power is back, and it's thirstier than ever in the new smart home

Tesla's new Powerwall battery could be world-changing

Designing for a sustainable future in the world's most remote village

Are you energy-savvy about your entertainment devices?

Cities around the world to dim lights for Earth Hour

Act fast to save big on LED light bulbs

Freaks of Nature

Stories You Won't Believe