Water
Water is the most common substances on the
planet.It is an important resource for the survival of all life,including our
humans,it is also the organisms most important part of.
Water has played an important role in the
evolution of life.Humans start on water awareness very early,both ancient
Chinese and ancient Western concepts of substance considered water as a basic
elements.
The most important use of water in
agriculture is for irrigation,which is a key component to produce enough food.