compressed natural gas

Unless there's a breakthrough in battery technology, gasoline will remain the primary auto fuel in the U.S. for years. But our dependence on imported oil comes with a major risk of supply disruption. And the U.S. has a domestic alternative that's ready and reliable: natural gas.

Many fuels have been proposed as alternatives to gasoline. Most face the early adopter with same problem -- where to refuel while on the road? A tool to address this chicken and egg dilemma has been created by the National Renewable Energy Laboratories, an Internet atlas showing the location of...