In the U.S., more than 65 percent of electric power is generated by coal and gas, the report noted.

CNN: Utilities pose biggest worldwide Y2K threat

Power is supplied by an electric current generated in a pack outside the body.

ECONOMIST: A promising new artificial heart wins regulatory approval

Green Electricity If your electric company offers you the chance to buy power generated from wind, solar or other types of renewable energy, should you do it?

NPR: Series Overview: How Green Is It?

Two hi-tech cables link the kite to an electric generator on the ground where the electrical power is generated.

FORBES: Italy's KITEnergy Converts High Altitude Winds to Electricity