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(g/km)b
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Pollutant Engine displacement Emissions prior to controlsc 1978-79 1980-89 1990-96 1997+ Gasoline- powered HC 50-169 cc 1....(Grams per brake horsepower-hour)
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Engine type and pollutant 1970-73 1974-78 1979-83 1984 1985-86 1987 1988-89 1990 1991-93 1994-...(Grams per brake horsepower-hour)
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Engine type and pollutant 1970-73 1974-78 1979-83 1984 1985-86 1987 1988-89 1990 1991-93...(Grams per mile)
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Engine type and pollutant Interim Tier 2f Interim Tier 2f Tier 2f Tier 2f 2004 2008...(Grams per mile)
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Engine type and pollutant Prior to controlg 1968- 1969 1970- 1971 1972 1973- 1974 1975 1976-...(Grams per mile)
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Engine type and pollutant Prior tocontrolg 1968- 1969 1970- 1971 1972 1973- 1974 1975 1976- 1978...(Grams per mile)
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Engine type and pollutant Prior to controlg 1968- 1969 1970- 1971 1972 1973- 1974 1975 1976-...(Grams per mile)
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Engine type and pollutant Prior to controlg 1968-1969 1970-1971 1972 1973-1974 1975 1976-1978...(Grams per mile)
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Engine type and pollutant Prior to controld 1968- 1969 1970- 1971 1972 1973- 1974 1975- 1976 1977- 1979 1980...Excel | CSV
Population group Urban area Gallons wasted % change RShort-term 1995-1999 % change RLong-term 1982-1999 R1982 1985 R1990 1991 R1992 1993 1994 R1995 R1996 R1997 1998 1999 % Rank % Rank Med...