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Clamshell reuse design .Clam is the most prosperous aquaculture industry in Taiwan, but clamshells are also one of Taiwan’s essential environmental issues .We grind the clamshells into powder. The main component of clamshells is calcium carbonate .The red part of the buoy is a reflective material made from clamshells powder that is luminous. Buoys can glow at night .The following section is a cement block made of calcium carbonate from clamshells .The buoy will slowly erode by the ocean. The cement part will not pollute the environment or marine life when it falls apart because this section is made from the clamshell.