Methods of sequestering CO2

A method of sequestering carbon dioxide, the method comprising:

• (i) contacting an alkaline-earth-metal-ion-containing salt water with CO2 from an industrial waste stream;
• (ii) removing protons from said alkaline-earth-metal-ion-containing salt water by an electrochemical protocol, wherein the electrochemical protocol produces no chlorine gas;
• (iii) subjecting the alkaline-earth-metal-ion-containing salt water to carbonate compound precipitation conditions to produce a man-made precipitated storage stable carbon dioxide sequestering product;
• and
• (iv) disposing of the precipitated storage stable carbon dioxide sequestering product to sequester carbon dioxide.