Water is the most abundant compound found on Earth and is essential for the survival of all life forms. More than 70% of Earth's surface is covered with water in the form of snow, glaciers, oceans, rivers and lakes. It is the only substance on earth that exists in all three physical states, in liquid state at standard temperature and pressure, in solid state as ice and in gaseous state as water vapor.
However, very little of this water is drinkable, as 96% of the Earth's water is salt water. Around 98% of the remaining freshwater is in the from of glaciers and polar ice caps. This leaves just about 1% of the freshwater on the surface in the form of rivers and lakes. Not all of this freshwater is safe for human consumption ad it is contaminated with bacteria.
To make fresh water safe for drinking, it needs to be cleaned so that it's intake does not cause any harm. The various properties of water make it a necessity for supporting life.
However, very little of this water is drinkable, as 96% of the Earth's water is salt water. Around 98% of the remaining freshwater is in the from of glaciers and polar ice caps. This leaves just about 1% of the freshwater on the surface in the form of rivers and lakes. Not all of this freshwater is safe for human consumption ad it is contaminated with bacteria.
To make fresh water safe for drinking, it needs to be cleaned so that it's intake does not cause any harm. The various properties of water make it a necessity for supporting life.
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