Tech

The growing costs of U.S. dependence on oil have hit home. Factor in world insecurity, economic instability, and it’s clear we pay a lot more to fill up our cars than the price on the pump. And with the threat of global warming, it’s clear we need to use much less oil. How can we start to change?
The century-old gasoline-powered engine is on its way out. Auto makers say the answer will someday be fuel cell cars. Maybe, but we need to get affordable cars now that use far less gas with lower greenhouse gas emissions.