Science: Why is water a precious resource?

• Water is important, but it is a limited resource on the Earth.
• Although 3/4 of the Earth is covered by water, only 1% of the water is suitable for consumption.
• Most of the water exists in the solid state as icebergs and glaciers, while some is collected underground as groundwater.
• Water also exists in the atmosphere as water vapour and in cold regions as ice and snow. 
• Oceans, seas, lakes, ponds, rivers and wells are sources of water.