Three of the most important and contaminating processes of salt mining are called
“deep-shaft mining”, “solution mining”, and “solar evaporation”. Deep-shaft mining consists of drilling the salt mineral or “Sodium Chloride” and elevating it to the surface of the mine.
Solution mining consists of the holes rising over salt mountains and water is incorporated to dissolve the salt, and then the solution created of dissolved salt is taken to evaporate until the salt is left behind, finally, the salt is dried and refined. The least harmful process of salt mining is solar evaporation. Solar evaporation consists in harvesting salt from the sea or salt lakes, the sun and the wind are an important factor in this process, they help the water
evaporate