Sand dunes and tree lines are like natural dikes. These have only appeared by the accumulation of land and soil. Unfortunately these have been gradually disappearing under the human impact.
天然的沙丘、防風林就像自然的護岸長城，他們也是堆積地形才有的產物，可惜這許多人們與海洋做「第一類接觸」的媒介地，已在各種人為力量下逐漸消失。