How CAFE works: 5 things you should know about gas-mileage standards

As automakers and policy wonks fret and fuss over future fuel economy standards, interested spectators may be lost in the fumes. What exactly are Corporate Average Fuel Economy standards, and what's important to know about them? The CAFE rules have many layers and facets—far too many to put into a single story that won't take an afternoon to... How CAFE works: 5 things you should know about gas-mileage standards