An eggshell is the outer covering of a hard-shelled egg and of some forms of eggs with soft outer coats. Bird eggshells contain calcium carbonate and dissolve in various acids, including the vinegar used in cooking. While dissolving, the calcium carbonate in an eggshell reacts with the acid to form carbon dioxide.
The real truth is that many people (including me) around the world think that they should throw away the eggshells.
So, what do you think?
Do you really think that we can’t use the eggshells?