Carbonated water, also known as soda water, sparkling water, or seltzer water, is plain water into which carbon dioxide gas has been dissolved.
Club soda may be identical to plain carbonated water or it may contain a small amount table salt, sodium citrate, sodium bicarbonate, potassium bicarbonate, potassium sulfate, or disodium phosphate depending on the bottler.
Carbonated water is reputed to be good for removing stains, for example coffee stains from mugs, or stains from silver.
Carbonation may occur naturally in spring water that has absorbed carbon dioxide at high pressures underground.
Artificial carbonation was first introduced in 1767 by an Englishman, Joseph Priestley, and was commercialized in 1807 by Benjamin Silliman, a Yale Univ. chemistry professor, who bottled and sold seltzer water.
Today, heavily sweetened, carbonated drinks, or sodas, are among the most popular beverages in the world.