PUBLIC MARKS from massivacom with tag "alternative fuels"

Former GM CEO says hydrogen should and will play an increasing role in America's drive for energy independence. The Rochester Hills-based company he now heads, Energy Conversion Devices Inc., will be a leader in this emerging hydrogen economy.

Former American astronaut Buzz Aldrin and Apple Macintosh billionaire Steve Wozniak will drive a monster 4WD to the South Pole next Christmas. They are claiming the trip will be environmentally friendly because Hummer H1 will be powered by a hydrogen fuel cell.

Americans are betting big on ethanol as a green fuel. European carmakers are far less convinced that ethanol is the best green fuel choice. They are experimenting with a variety of biofuels, including biodiesel, biomass, and hydrogen - as well as compressed natural gas and engine technologies that reduce harmful carbon-dioxide emissions.

Switching from gasoline to ethanol - touted as a green alternative at the pump - may create dirtier air, causing slightly more smog-related deaths, a new study says.