Which factor is not responsible for deficiency of water?

• Earth is called the "Blue Planet" because it looks blue from space due to the presence of water on its surface.
• Around 71% of the Earth's surface is covered with water.
• While the other 29% consists of continents and islands.​
• There are various natural sources of water that are used by humans.
• They are used for carrying out daily activities like drinking, washing, and cleaning purposes and also used by animals and birds for drinking purposes.

Key Points

• Water scarcity will possibly pose the greatest challenge on earth.
• It is because of increased demand coupled with shrinking supplies.
• There is over utilisation of water due to increasing population which is also one of the causes of increasing water pollution.
• Water pollution is the addition of unwanted material into water that makes it unfit for human consumption.
• With increasing reliance on water bodies for waste disposal etc, there has been ever-increasing water pollution.

Factors for water scarcity:

• Water pollution
• Increase in population
• Climate change
• Inefficient water management
• Inadequate infrastructure
• Lifestyle changes
• Unequal water distribution
• Increased Industrial usage​

Important Points

Rainwater:

• Rainwater is known as the primary source of water which gets collected at rivers and lakes and some of this water is also available as groundwater.
• Rainwater is considered the primary source of water because the lost water from other sources like rivers or lakes can easily be replenished by rainwater. 
• It is the only process by which new water is added to the ecosystem.
• Water harvesting is a practice to conserve water by collecting excess rainwater in an organized way.
• The excess rainwater is not allowed to flow and get wasted but collected in tanks. 

​Thus, excess rainfall is not responsible for the deficiency of water.