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Sea water collects on the front walk way of a home in Tangier, Virginia, May 15, 2017, where climate change and rising sea levels threaten the inhabitants of the slowly sinking island.
Now measuring 1.2 square miles, Tangier Island has lost two-thirds of its landmass since 1850. If nothing is done to stop the erosion, it may disappear completely in the next 40 years. / AFP PHOTO / JIM WATSON        (Photo credit should read JIM WATSON/AFP/Getty Images)
Sea water collects on the front walk way of a home in Tangier, Virginia, May 15, 2017, where climate change and rising sea levels threaten the inhabitants of the slowly sinking island.
Now measuring 1.2 square miles, Tangier Island has lost two-thirds of its landmass since 1850. If nothing is done to stop the erosion, it may disappear completely in the next 40 years. / AFP PHOTO / JIM WATSON        (Photo credit should read JIM WATSON/AFP/Getty Images)

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    U.S. island in danger of being swallowed by sea

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U.S. island in danger of being swallowed by sea

Tangier Island, Virginia could be uninhabitable in 20 years due to rising water levels and erosion. CNN's Jennifer Gray reports

U.S. island in danger of being swallowed by sea

Tangier Island, Virginia could be uninhabitable in 20 years due to rising water levels and erosion. CNN's Jennifer Gray reports