Water

W- Wanted! Wanted! Wanted!

  oh! my God, where are you

A- Antarctica to Asia everywhere is the scarcity

 in a small village or in a smart city.

T-Trees, plants, leaves, roots everyone needs it

  oceanic things not required but terrestrial things make a fit.

E-Enters everywhere during the flood

  causes Tsunami and strikes hearty blood.

R-Rare things in sweet form as it is precious

    salty forms used only to make salts

      so, it is needed in serious...