A full-size SUV with a 6.0-liter engine is Green Car of the Year? Strange but true: The 2008 Chevrolet Tahoe Hybrid beat the Chevy Malibu Hybrid, Mazda Tribute Hybrid, Nissan Altima Hybrid, and Saturn Aura Hybrid for the honor. It makes sense, though: that enormous engine is a two-mode hybrid—a second-generation hybrid powertrain that both boosts mileage at highway speeds and allows for the serious towing power a vehicle like the Tahoe needs. (Incidentally, PopSci gave the two-mode hybrid a Best of Whats New award in our December issue).

Mainstream sedans are ready for their gas-electric acid test. When it hits dealerships this spring, the Honda Civic will be the first to get a hybrid powertrain.

The battery package in the Civic is 42 percent smaller than that of its hybrid sibling, the Insight, which means more room inside.

In our tests near Palm Springs, California, the 1.3-liter four-cylinder powered the car to 60 in a respectable 11 seconds. Expect fuel economy in the high 40s, 10 mpg better than ordinary Civics.

Price: $20,000.