What current geologic processes ultimately doom any attempts to stabilize and preserve shorelines within a century or so?

Question

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The gradual sea level rise of 1-2 mm/year related to global warming ultimately dooms any attempts to stabilize and preserve shorelines within a century or so. As the sea level rises, shores erode and coastal areas are inundated. This process is exacerbated by the increasing storm severity, making it challenging to protect shorelines. Global plate motions and tectonic shifts and loss of river discharge from dams and water use on most major rivers may cause changes in the shoreline; however, they do not have as immediate and significant an impact as sea level rise.

What Current Geologic Processes Ultimately Doom Any Attempts to Stabilize