The newest building in Facebook's Menlo Park, Calif., headquarters sits right on San Francisco Bay. Its location offers a spectacular view, but an uncertain future.
By the end of the century, scientists say, sea level could rise three, four, maybe even five feet, depending on how climate change plays out.
Facebook says the company has planned for that, by building above the flood plain.
But roads, freeways and other crucial infrastructure around the bay — $62 billion worth, according to one study — are at risk.