How Natural-gas Vehicles Work Cars that run on alternate fuel sources are becoming increasingly important. A natural-gas vehicle, or NGV, is the perfect example of such a car -- it's fuel-efficient, environmentally friendly and offers a relatively low cost of ownership. Learn about the basic idea of NGVs, the unique design challenges involved, and the advantages and benefits of this technology.

	How Hybrid Cars Work With urban sprawl on the rise, many of us find ourselves commuting an hour or more twice a day, five days a week! Whether it’s the price of gas or the greenhouse effect that worries you more, the solution could be Insight. Learn the secrets behind hybrid cars and examine two real-world examples.
	How Electric Cars Work Electric vehicles, especially EVs powered by fuel cells, are a compelling alternative to gasoline-powered cars. They use environmentally friendly technology to get you to your destination without the need for costly, supply-limited gasoline. Find out how today's electric cars work.
	How Fuel Cells Work In the technology world, fuel cells are a very popular topic of conversation. According to many experts, we may soon find ourselves using fuel cells to generate electrical power for our cars and all sorts of devices in our homes. Learn how fuel cells work and how efficient they really are.
	How Gas Prices Work Gasoline is the bloodline that keeps America moving. Our personal vehicles alone guzzle over 100 billion gallons of gasoline and diesel fuel each year. When gas prices are on the rise, it can be economically devastating –- an increase of just a penny per gallon can hit some of us pretty hard. Find out what drives the price at the pump.
	How Biodiesel Works You probably know that soybean byproducts are nutritious and healthy. But did you know they can power a car? Find out how soybean and other plant oils, as well as animal fats, are used to create the environmentally friendly fuel -- biodiesel.
	How the BMW H2R Works It's sleek. It's aerodynamic. It's powered entirely by hydrogen. The BMW H2R has already set nine speed records in its class. Learn all about the H2R and BMW's unique, liquid-hydrogen combustion engine.
	How the Ford Escape Hybrid Works What's so unique about the latest hybrid car on the market? For starters, it's an SUV. What's more, you'd never know it's a hybrid: The eco-friendly Ford Escape features almost the exact same exterior, passenger room and cargo space as the non-hybrid model. Check out the engineering, specs and features of the Ford Escape Hybrid.
	How GM's Hy-wire Works What's a car without an engine? A Hy-wire: no combustion, no linkages, and driver controls that work like a video-game joystick. Automakers are moving beyond the conventional car, toward a computerized, environmentally friendly alternative. See what you could be driving in the future.
	How the Hydrogen Economy Works With fossil fuels in limited supply, the ever-increasing consumption of this commodity causes problems ranging from global warming to dependence on outside oil sources. Hydrogen is a possible fix, and the technology to take advantage of it is already out there. Find out the benefits of and hurdles facing a hydrogen economy.