Swedish Energy Agency

It's interesting to see the variations among green technologies as automakers, both in production cars and motorsports, strive for greater fuel efficiency and reduced emissions. The most common means for automakers to boost gas mileage thus far have been hybrid-electric technology and turbodiesel engines. However, we've also seen such lightweight materials as carbon fiber and aluminum used in production cars, and now we have another technology that’s starting to make waves in the industry: the flywheel-based Kinetic Energy Recovery System, or KERS. Probably most widely recognized from...