We already have one billion, worldwide. Transportation researcher Dan Sperling says that stands to double within about a generation, with unthinkable consequences for air quality and climate change.
But it’s his job to think about the unthinkable. Sperling is a founder of the UC Davis Institute of Transportation Studies and a member of the California Air Resources Board. He talks about his new book, Two Billion Cars, on today’s podcast of NPR’s Fresh Air.
About the author
KQED Science Editor, specializing in weather, climate, water & energy issues. Formerly senior editor of Climate Watch. View all posts by Craig Miller →
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