That funny "green police" Super Bowl commercial

The Denny's Grand Slam breakfast Super Bowl commercials could have doubled as environmental ads, if only the message was about free range pastures, rather than overworked laying hens.

And while it may not have lived up to the standards of that Doritos kid slapping his mom's date, one of the funnier Super Bowl commercials was for the Audi A3 TDI, which gets 34 mpg of diesel fuel, and was chosen as Green Car of the Year by Green Car Journal.

Even clean diesel, though, is not as clean-burning as gasoline. The Audi A3 produces 15% more carbon in a year than either the Nissan Altima or Toyota Camry hybrid, which also get 34 mpg. It emits 9% more than the Toyota Yaris, which burns gasoline in a conventional engine and gets 32 mpg.

But the Audi A3 TDI still achieves impressive mileage, and we haven't seen a better commercial for any of those other comparable models:

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Reprinted with permission of Hearst Communications, Inc