New vehicles would be 30 percent cleaner and more fuel-efficient by the end of the program

Under the changes, the overall fleet average would have to be 35.5 mpg by 2016, with passenger cars reaching 39 mpg and light trucks hitting 30 mpg under a system that develops standards for each vehicle class size. Manufacturers would also be required to hit individual mileage targets.

its not rocket science, nor is it the end of the world..