What are the four main uses for calcium carbonate?
                                
                                
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                                    4 min read                                
                            
                                Approximately 4% of the Earth's crust is composed of calcium carbonate ($CaCO_3$). This versatile chemical compound has been leveraged by humans for centuries, offering crucial applications across a wide range of industries, including its four main uses: as a building material, a soil amendment, an ingredient in industrial manufacturing, and a medical supplement.