Is it possible for a stream of air to behave like a door? Surprisingly, yes. This door may not block out burglars, but it can certainly fight against cold winds, flying insects and pollutants.
Roads that reduce pollution. Self-repairing buildings. It may sound like the stuff of science fiction, but nanotechnology is poised to fundamentally change the way we build the world around us. See more »
Sure, you'll save energy and money when you go green, but how much do you know about what it costs to make the switch? Test your knowledge and take our Super Savers: The True Cost of Green Construction Materials quiz! See more »