Some 10 to 12 kilograms of rare earth elements are used in the production of every hybrid car.
Cerium, for example, is used in car windows to absorb UV radiation and reduce incoming heat. It's also found inside nickel-metal hydride batteries and hard disk drive read-write mechanisms.
April 22, 2011 4:00 AM PDT
Photo by: James Martin/CNET
| Caption by: James Martin
Conversation powered by Livefyre