(2) Water is vital because life on earth could not exist without it people animals and
plants all need water in order to exist every living thing is mostly water a person's body
is about sixty-seven percent water a bird is about seventy-five percent water most hit
is about ninety percent water.
(3) Most of the water in the world is saltwater ninety-seven percent of the water on
earth is in the oceans because seawater is salty people cannot drink it or use it to grow
plants for food only three percent of the earth's water is fresh only one percent of the
water in the world is easily available for human use.
(4) Even though water is essential to life human beings often poison it with chemicals
li,. from industry and agriculture when people foul water with pollution the quality of all.,i ,; life-plant life animal life and human life-diminishes life cannot exist without fresh
f ' : ,, ,3,,,> ,_,water so it is essential for people to take care of this important natural resource./! I..! ..246 CHAPTER 8