Papers Checklist for More Fuel Efficient Auto (GreenerCars.org) Provides a list of things to check to make your car operate more efficiently. 03-17-00. Electric Cars Government Tightens Gas Mileage Rules (ABC News) "The government set tighter gas mileage rules Wednesday for pickups and sport utility vehicles, including bulky SUVs like the Hummer H2 and Chevrolet Suburban, responding to rising concern about the supply and cost of energy from abroad." 03-06 Greenest vs. Meanest Cars (GreenCars.org) Provides a list of the greenest (least polluting) and meanest (most polluting) vehicles. 0-08 Hybrid Cars