In the latest Forbes list of the 10 worst polluters, you'll find the usual suspects including the Hummer H2 and Chevy Suburban 2500 (tied for fifth place). But at the top of the list is an SUV that hasn't received its fair share of environmental scorn: the Volkswagen Touareg V10 TDI.

As California returns to requiring automakers to sell zero-emissions vehicles, BMW is apparently aiming to get in first on the gold rush. Automotive News reports BMW will export an electric version of its Mini to California. The state's zero-emissions vehicle program will require nearly 60,000 plug-in cars to be sold in the state between 2012 and 2014.

In April, the U.S. Secretary of Transportation proposed new CAFE (corporate average fuel economy) standards that would increase the average efficiency of passenger cars and light trucks by 4.5 percent per year from 2011 to 2015. A lot of people wondered why the federal government wasn't aiming higher.

Passenger-car gasoline in Italy costs the equivalent of around nine bucks a gallon. Formula One racing fuel goes for several euros more. And at a (full-speed) fuel consumption rate of between three and four miles per gallon, Ferrari's F1 cars can burn through heaps of Italian green during track testing. That's one reason the company, along with a few other F1-entrenched firms, are betting on the latest virtualization tech to help shave a few Euros off the high cost of testing.

British industrial designer James Dyson made a fortune turning a pedestrian household appliance into a fashion item for suburban strivers. Box-store shoppers recognize his bagless vacuum cleaner by that future-sexy, ultra-maneuverable yellow orb that stands in for wheels. Now, according to the UK's Daily Mail Dyson is turning his attention from closet to garage: his firm is reportedly developing an electric car.

As the host of one of the oldest and most famous racing events in the world, Indiana has always been known for fast cars. For now, those cars are still stuck on the racetrack, but a new study in the journal Transportation Research Record claims the roads are no more dangerous when motorists drive at Andretti-like speeds, providing further data in support of an American autobahn.

The run-up to the annual 24 Hours of Le Mans endurance race is always a nail-biting enterprise for race teams. Naturally, techs are most concerned with assuring cars' ability to sustain the day-night race, which is the ultimate test for GT cars and sportscar prototypes that will wind through the Circuit of the Sarthe -- on a combination of racetrack and public roads -- in Le Mans, Sarthe, France. This year there's an added kink keeping teams up nights. It appears the gods of aerodynamics have been sending LeMans prototype-class racecars into the ether with a cosmic finger flick.

The tripod is a fine and stable construct for photography and navigation, but how well will it work for motorcycles? We're not sure,
but one student at California's Art Center Pasadena is challenging singletrack motorcycles and typical three-wheelers with an anthropomorphic, Yamaha-branded three wheeler concept called the Deus Ex Machina.

The forward-looking personal conveyance is a mobile exoskeleton propelled by in-wheel electric motors—or, more succinctly, a trike you can wear.

Rolls-Royce Motor Cars today provided a peek at what its next luxury car will look like. Design sketches of the car known internally as RR4 hint at a model that is smaller and sleeker than the big-ticket Rolls-Royce Phantom. Car wonks say the RR4 will face off against the successful Continental from Volkswagen-owned Bentley, at a price of between $250,000 and $280,000, according to Edmunds Inside Line.

We reported last week on how feebly powered, fuel-sipping 1990s-vintage hatchbacks have been lighting up the used car market recently due to skyrocketing gas prices. In an interesting twist to this phenomenon, I actually benefited myself somewhat from this hysteria when I had to sell my beloved natural-gas-powered 2006 Honda Civic GX last week on eBay, turning it into one of the smarter investments I made all year.