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Millions of Americans live in places where it’s too late to slow the threat of rising sea levels, a new study warns, and researchers are hoping those findings will serve as a call to action for cities that can still be saved by cutting carbon emissions. 

The study, published Monday in the journal Proceedings of the National Academy of Sciences, examines how much rising sea levels will affect cities across the United States over time if carbon emissions stay the same or decrease. The most startling finding is that 414 towns and cities have already passed their lock-in date, or the point at which it’s guaranteed that more than half the city’s populated land will eventually be underwater no matter how much humans decrease carbon emissions; it’s just a matter of when.

That’s “the date where we let the genie out of the bottle, when it’s past the point of no return,” lead study author Benjamin Strauss of Climate Central told The Huffington Post.

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<span class='image-component__caption' itemprop="caption">A woman walks atop an earthen levee on the Mississippi River in the Lower 9th Ward as the Steamboat Natchez passes in August 2015 in New Orleans. The city is ringed by hundred of miles of levees to protect against flooding.</span>
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A woman walks atop an earthen levee on the Mississippi River in the Lower 9th Ward as the Steamboat Natchez passes in August 2015 in New Orleans. The city is ringed by hundred of miles of levees to protect against flooding.

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Click link below for story and video:

http://www.huffingtonpost.com/entry/us-cities-sea-level-threats_561d338fe4b0c5a1ce60a45c?utm_hp_ref=tw

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