Oh i just looked at USA's gasoline and it is finally higher than in Italy.
Hopefully this will help stopping mega-hiper cars dumping 1litre per kilometer
@Jtugboattizzymo a small fact: Italy's CO2 emission per 100 inhabitant (in thousand metric tonnes) is 7.75 , and USA's is 19.86. Maybe it's time for you to change a little your habits?