Daniel Sperling is professor of civil and environmental engineering & the founding director of the Institute for Transportation Studies at the University of California-Davis in Sacramento, California.
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32:20
Staying Green, From Point A To B
How could new policies and technologies make getting around more eco-friendly?
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23:52
Predicting the Car (and Fuel) of the Future
Will electric cars ever be popular? A trip into the Science Friday archives for a look at the rise of alternative-fuel vehicles.