TV-PG
S1 • E2 Jan 26, 2010 60m8.27.0
Water, at least the small potable fraction of the huge planetary supply, is vital for wildlife. It's availability largely determines human population too, even more since the invention of agriculture, which also gave rise to ingenious methods to gather and use it such as irrigation and deep wells. Furthermore water is important for navigation, climatic phenomena and disasters.
