Motor sport is “the world's fastest R&D lab,” said Dr. Kit Chapman, author of "Racing Green."
At their peak, some IndyCar races drew 100,000 people to the track. Now only the Indy 500 packs the stands.
In 1907, a small group of automobile enthusiasts wanted to see if it was possible to race from China to France.
In the Middle East, organizers of the big Formula 1 Grand Prix of Bahrain are trying to press ahead despite demonstrations against the Bahrain regime’s human rights record.