Version: 2008
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CNET'S QUICK GUIDE: The cleanest cars you can buy

AT-PZEV aka SULEV-AT-PZEV (Advanced Technology Partial Zero Emission Vehicle)

AT-PZEV cars meet the same exacting standards as PZEV vehicles. So what's the difference? An AT-PZEV must also use the kind of technology found in Zero Emission Vehicles--such as electric motors or compressed natural gas (CNG). What cars use this "ZEV-enabling" technology? At this point, mostly hybrids do, such as the Prius, the Honda Civic, and the 2006 Ford Escape. (Note: Not all hybrids are AT-PZEV. The Toyota Camry Hybrid is classified as a SULEV.)


2006 Ford Escape Hybrid
The bottom line: The 2006 Ford Escape Hybrid still feels unfinished. Despite a commendably advanced power train, the rest of the vehicle disappoints, and the overall ownership experience won't be salvaged by a few extra miles per gallon.


2006 Honda Civic Hybrid
The bottom line: The cabin of the 2006 Honda Civic Hybrid catapults the driver into a cool future where voice commands operate navigation and audio, but the rackety engine and the less-than-smooth power train serve as a reminder that hybrid development is still in its early stages.