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Why should we stop Sea Levels from rising?

Global changes in the mean sea level, which are due to other factors than those discussed above, are known as eustatic sea level changes. Over the twentieth century, global sea level has risen on the average of 2.0 millimeters (0.08 inches) per year for a total of 10 to 25 centimeters (3.9 to 9.8 inches). According to a recent Environmental Protection Agency study, it is expected to rise at least another 20 centimeters (7.8 inches) by 2100.  What can we do to stop Sea Levels from rising?