A factory-installed plug-in hybrid option — though I wonder if tapping a coal-powered electrical grid improves the Prius's carbon footprint that greatly. The real questions are: Who will prove more environmental in the court of pseudoscientific, envirosocial one-upsmanship — the owners who hold on to their existing vehicle, or those who trade in for the new, more fuel-efficient ones? And will the Bay Area see more violent, Prius-hating backlash?(Photo by Rick Audet)

What the project doesn't do is compare the environmental cost per person-mile to that of Google's private commuter bus fleet. Nor does it compare the total carbon footprint over time of a newly-manufactured plug-in electric hybrid to, say, converting an existing automobile or improving public transportation. But then, shiny new cars are the classic California status symbol, and alternative-fuel vehicles are just the latest form of conspicuous consumption — the paint job just screams, "Look at me and how environmentally conscious I am!" (Photo Google.org)

Priuses may be better for Google's corporate image, but not the images it hopes to snap for Street View. It's proved unfeasible to mount the bulky Street View cameras on a Prius. No word on whether Brin has been persuaded to compromise, or if his engineers have somehow found a solution. For now, it seems Google's hiring hundreds of drivers with nothing for them to drive.

(Photo by sebr)