In some regions of the world , the increasingly accurate sea level data is being used by planners to mitigate against the risk of flooding . Global sea - levels rose by an average of 3 meters a year over the past two decades . Most accurate estimate yet based on satellite data from European Space Agency . Sea - level rises uneven around the world with Pacific Ocean the worst . Venice one of many cities with flood protection barriers .
Global sea - levels rose by an average of 3 meters a year over the past two decades . Most accurate estimate yet based on satellite data from European Space Agency . Sea - level rises uneven around the world with Pacific Ocean the worst . Venice one of many cities with flood protection barriers .