If current population trends continue, the already crowded U.S. coast will see population grow from 123 million people to nearly 134 million people by 2020, putting more of the population at increased risk from extreme coastal storms like Sandy and Isaac, which severely damaged infrastructure and property last year. To learn more about how the U.S. coastal population is changing, get your questions ready and tune in for our Coastal Population Tweetchat on April 17, 1:00 p.m. ET.

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