Currently, the research effort has pioneered a hybrid engine that is cleaner than a diesel engine and almost twice as efficient as a typical gasoline-powered engine.

FORBES: The Other "Hybrid Engine"

The BR500's four-stroke engine is five times cleaner than the standard two-stroke models.

NPR: L.A. Looks to Cut Smog with Leaf Blower Trade-In

The graphics haven't been completely updated (the cars are basically still just standard polygons), but the UI is cleaner, a physics engine has been added in with power-ups and other goodies, and there is a really robust replay system, which lets players save their best shots and stunts on video, and edit and upload those to YouTube and other video sharing services.

ENGADGET: blogger-avatar

It is a cleaner, more fuel-efficient engine than the gas-guzzling original, which the carmaker stopped producing in 1971.

FORBES: Magazine Article

And in June, Lexus will introduce a hybrid V-8 version, the LS 600h L--that will provide the performance of a V-12 engine, but offer better fuel economy and cleaner emissions.

FORBES: Magazine Article

The newly designed 16.05-megapixel Live MOS Micro Four Thirds Sensor means images will be cleaner than ever, while the incredible processing power of Venus Engine VII FHD maximises the potential of your images and videos.

ENGADGET: Panasonic's Lumix lineup grows: DMC-G5 Micro Four Thirds, DMC-FZ200 superzoom and DMC-LX7 hands-on and sample shots

But Detroit automakers are still selling the combustion engine, too, and making money at it until we all find a cleaner way to get from point A to point B.

FORBES: Too Critical