Water is more precious than gold.

Water is more precious than oil, or gas, and yet we pollute 5 million gallons of it every time we frack a well.  That toxic water is injected into the ground, where it is causing earthquakes.

Aside from being essential to life, water has amazing properties.  It is the only substance that expands when it freezes, this is due to the polarity of the H2O molecule, which assembles in predictable configurations, like in a cloud, becoming snowflakes.

Hydrogen is the first element to form in the ancient universe, after the Big Bang.  Oxygen has to be assembled in a star, which subsequently explodes, seeding space with the heavier elements from which everything we know is constructed.