The scientists ranked each automaker based on the smog-producing capacity of their vehicles and effect the vehicles had on global warming. Honda was the greenest company for the fourth straight year. The company offers small-engine vehicles, hybrids and one powered by natural gas. Honda will offer an advanced diesel engine (shown) by 2009. Toyota also scored better-than-average scores in every vehicle class. Chrysler group was last, mainly because it relies heavily on trucks and minivans.
[Source: Associated Press via Fox 12 Oregon]