Nearly 47% of new cars sold in the UK now emith less than 130g/km of CO2, which equates to an average fuel economy rating of 46 MPG US (54 mpg UK). BBC News - Sales of low emission cars soar in UK But only 1.3% of all new vehicles sold in 2011 were hybrids or EV's. The reduction in emissions (or increase in fuel economy) is down 23% since 12 years ago in 2000. So it can be done. I don't notice people driving slower and no not all cars are diesels either. It's just the economy rules imposed have meant that manufacturers focus their attentions to fuel economy. A saving of 1% here or 2% there has obvioulsy added up over the years.