Water is probably the most universal issue there is. No-one can survive without it, but still there are billions of people without access to clean waterwhile those living in industrialised nations, such as ourselves, may choose between tap water, mineralised bottled water, mineral bottled water, water with gas, water without gas etc. etc.
Water facts collected by the Missoula and Berlin groups:
Some local water facts provided by Berliner Wasserbetriebe: