US gas milage hasn't improved in 80 years

A good post on gizmag about the US gas milage. My comment is below. This brings up one of my biggest concerns about cars here in Ensenada. Called 'Chocolate Cars' illegally imported clunkers crowd the streets here. Polluting more then any 100 times more then newer well maintained cars. If the government wanted to clean the air quickly they would run these cars off the street. The poor people who use them are throwing their money away in maintaining blown engines, burning oil, and excessive fuel consumption. They should buy a bike, which would also help with their obesity as well.