Researchers take calcium carbonate, calcium carbonate is in csurface coating increases the durability to the workpiece and can be further mixed with clay to reduce the consumption of natural soil is. Ceramic tile can be removed from crab shells to decorate their houses. It also helps in the cool indoors with the first year will be about 7500 tons shell crab shell, they will be disposed of in landfills and incinerated. Which cause pollution Take the scraps of waste. To increase the value of waste materials.