Alternating current (AC) beat out direct current (DC) because it worked well over short distances. But direct current is significantly easier to control on a smart grid and travels better, says Herman J. Trabish.
Dec 8, 2010 greentechmedia
In 15 years, the number of cars on the road worldwide is expected to hit 2 billion. Dan Sperling thinks focusing on electric vehicles and low carbon fuel standards will allow us to hit number and survive.
Sep 25, 2010 greentechmedia
'Waste heat' is a hot area of research as an alternative energy source. Providers say they can turn excess heat produced by machines in factories into clean electricity.
May 4, 2010 greentechmedia
The current means of generating hydrogen for fuel results in a release of carbon dioxide emissions. Researchers think aluminum may be the solution to the pollution.
Dec 31, 2009 greentechmedia