an update of energy and greenhouse emission impacts fuel ethanol michael wang center for transportation research argonne national laboratory the 10 th annual conference scottsdale az feb 8 2005 2 us now consumes about 19 million b d oil accounts 75 0 3 6 9 12 15 18 21 24 27 30 1970 1975 1980 1985 1990 1995 2000 2010 2015 2020 2025 p e t r o l eu m use mbd water rail actual projection automobiles air light trucks heavy veh production off road other uses data sources ornl 2003 databook eia outlook review sector is second largest ghg emitting source epa 2004 inventory gas emissions sinks 2002 1 000 4 5 7 1991 1992 1993 1994 1996 1997 1998 1999 2001 i llion ic tons c eq electricity generation industry agriculture residential commercial effects have been subject to debate many studies
