Groundwater constitutes the largest reservoir of freshwater in the world, accounting for over 97% of all freshwaters available on earth (excluding glaciers and ice caps).
Is ionann screamhuisce agus an taisce is mó d’fhionnuisce ar an domhan, screamhuisce atá i 97% den fhionnuisce atá ar fáil ar an domhan (gan oighearshruthanna ná oighearchaidhpeanna a áireamh).