Looking for a more green car? Well, why not start from the bottom to see what’s not green.

Forbes has a slide show of the Least Green Machines (cars). The 2006 Ford E-Series van seems to be the worst with an air-pollution score of 0/10 and a greenhouse-gas score of 0/10. Not surprisingly, SUVs, trucks and vans make up the entire list.

At the end of the slide show, there is a link to the Greenest Machines.