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composed of sand, coastal erosion creates little problem for the beach because it uses this sand to Chapter 9 Beach Erosion and Loss 3 sustain the environment. After all, sand is the lifeblood of beaches. However, migrating upward and landward through space and time does create a huge problem for buildings and roads built too close to the shoreline. And therein lies the rub â protecting the land with a seawall will lead to beach loss.
According to Lal (2001), water erosion is the main driver of soil degradation. At the end of the 20th century, for instance, almost 67% of the worldwide approximately 16.4 million km 2 of degraded soil was linked to water erosion.