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This one-hour program is divided into six chapters. Choose any chapter below and select QuickTime or Windows Media Player to begin viewing the video. If you experience difficulty viewing, it may be due to high demand. We regret this and suggest you try back at another time. Technical Help \| Feedback \| Program Credits \| Program Transcript


	watch chapter 1 in QuickTime Windows Media: hi \| low	HITTING THE ROAD Projections suggest that by 2050 there will be two billion vehicles on the world's roads, two and a half times as many as there are today. The "Car Talk" duo, brothers Tom and Ray Magliozzi, hit the road in search of the car of the future. running time 8:16





	watch chapter 2 in QuickTime Windows Media: hi \| low	HYDROGEN FUEL CELLS Iceland, with a thousand times fewer people and cars than the U.S., has introduced the world's first hydrogen-fueled public buses in an effort to curb dependence on imported oil. running time 6:40





	watch chapter 3 in QuickTime Windows Media: hi \| low	TOWARDS BIOFUELS Tom and Ray look at possible new ways to make ethanol. Such "biofuels" have much lower greenhouse-gas emissions but, critics say, come at a cost. running time 6:34





	watch chapter 4 in QuickTime Windows Media: hi \| low	FRONTIERS OF EFFICIENCY Engines have become more fuel-efficient over the years, but that efficiency has been channeled into more powerful vehicles rather than improving fuel economy. running time 11:13





	watch chapter 5 in QuickTime Windows Media: hi \| low	PLUGGING IN Can the next generation of hybrid cars cause an energy revolution by allowing us to plug into the grid? Vehicles powered from power plants could substantially reduce greenhouse-gas emissions. running time 10:22





	watch chapter 6 in QuickTime Windows Media: hi \| low	TAKING ACTION To make the switch to more Earth-friendly vehicles, we need more than visionary thinkers and eco-conscious consumers, experts say. We need concerted government action. running time 7:07