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Sea walls must be maintained consistently and will need to be built higher and higher as sea level rises. This type of man-made barrier also has implications for the natural coastline.
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French Sea Wall

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Flooding in Florida from a "King tide."
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Flooding From King Tide

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A sediment plume from the mouth of the Mississippi River into the Gulf.
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Mississippi River Delta

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The Portage Glacier near Anchorage, Alaska has retreated so much that it is no longer visible from the visitor center built for its viewing in 1986.
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Portage Glacier

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A map of sea level change in cm from 1993 to 2008.
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Sea Level Rising

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A diagram showing how NOAA uses satellites to measure sea level
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Measuring Sea Level Rise Via Satellite

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Measurements of carbon dioxide in atmosphere since 1958
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Keeling Curve

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An iceberg calves from Antarctica's Pine Island Glacier
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Pine Island Glacier

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World map during last ice age
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Ice Age Map of the World

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Screenshot of Gulf oil spill interactive.
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Gulf Oil Spill Interactive Screenshot

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"Black smokers" spew hot water full of particles from the seafloor.
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Black Smoker at a Hydrothermal Vent

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Portrait of Mary Anning, before 1842
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Portrait of Mary Anning, before 1842

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