NASCAR urged to explore renewable fuels.

DAYTONA BEACH, Fla. - While working for General Motors in Brazil in the 1990s, Brent Dewar got a firsthand look at the country?s successful switch from an oil-based economy to ethanol. Dewar wants to see the same thing happen in the United States, and he thinks NASCAR can help. He?s lobbying officials to consider a switch from gasoline to ethanol.