Sinkholes - Buried Alive

NOVA: In February 2013, a giant hole swallowed the home of Florida resident Jeffrey Bush. Bush, whose body was never found, was a victim of a sinkhole, a growing worldwide hazard that lurks wherever limestone and other water-soluble rocks underpin the soil. When carbon dioxide in the air dissolves in rainwater, it forms a weak acid that attacks the soft rocks, riddling them with holes. With compelling eyewitness video of these dramatic collapses, this documentary investigates the phenomenon.