There’ll be plenty of beer consumed at next week’s Democratic National Convention in Denver. Not all of it will induce hangovers. A fleet of GM flex-fuel vehicles transporting delegates, members of the press and other convention guests will be running on clean-burning ethanol, derived from waste beer produced by MillerCoors. The program is the latest headline-grabber for the growing ethanol industry, but it also highlights the evolution of biofuel technology. As the debate continues about the merits of traditional corn-based ethanol, newer forms of ethanol are emerging. From waste beer to landfill waste, these newer forms of ethanol promise an environmental double, fuel that burns cleaner AND reduces waste.
