regions are sinking faster than others one example is the coastline of the u.s. state of louisiana. is the mississippi delta new orleans is located in this area in here and most of the land surface has been disappearing over the last thirty years and our projections are as this will disappear in the next ten twenty thirty years it will be gone and so. when this disappears water from a hurricane can more readily impact the city of new orleans so the cities on the delta are at risk all of them. i mean without question and they're part of the list of one hundred thirty six areas at risk if we look at the twentieth century in many ways that probably for many cities the substance has been much much more important than climate and to sea level rise because we're talking about meters of change