Cari Spivek thought it was wasteful that so many employees like her were driving to work in different cars. Her idea became the Google Shuttle, a private transit network made of biodiesel-powered, wi-fi-enabled, air-conditioned buses transporting employees from around the Bay Area to Google headquarters in Mountain View, south of San Francisco.At first it was used by a hundred employees from the entire area. But Google has been growing and now shuttles more than 1,200 Googlers every day, many from the Mission District, which has recently added a second bus.

Anyone who has ever taken a population class knows that every migration has a countermigration. In addition to all of the Google employees already living in the city and doing less environmental damage by taking the shuttle, many employees are choosing to move to the city because there is now a comfortable shuttle to take them to work.

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