20th century sea level rose at fastest rate since founding of Rome
Global warming implicated in half or more of oceans’ rise during 1900s

RISING WATERS Sea levels rose faster during the 20th century than during any other century since the foundation of Rome in the eighth century B.C., new research shows. Higher sea levels increase the risk of storm-induced flooding, as seen when Superstorm Sandy hit the East Coast in 2012.
NPS Climate Change Response/Flickr