Tag: water a precious resource

• Limestone is a sedimentary rock composed primarily of calcium carbonate($CaCo _3$) in the form of the mineral calcite.
  
• Limestone tiles are made of natural stone, and it's one of the most affordable options if you want to avoid artificial materials for your flooring.
• Limestone floor does not allow rainwater to seep into the ground because it is low porosity.
• So, the correct answer is 'Limestone floor'.

70% of the earth's surface is covered with water, yet only around 3%  is fit for human consumption.The remaining is frozen or salty.The consumption of water goes on increasing due to population,eventually leading to scarcity of water. The industrial wastes pollute the water reservoirs, making it unfit for human consumption.

The water present underground within cracks in between the rocks, soil or sand known as groundwater. This groundwater is replenished by the rain water that seeps into the soil through the cracks. It forms around twenty percent of the world's fresh water supply and is the major source of water in rural areas. Thus the correct answer is option B.

The main cause of water depletion is due to over pumping of ground water

The following can be the solution for water scarcity caused by agriculture are:
a) knowledge and resources for producing more and better crops with less water.
b) drip water irrigation.
c) more efficient water management systems adapted to climate variability.

Mostly water is used in agriculture purpose.

Use of water in agriculture is the main cause of water scarcity because a large amount of appropriate quality and quantity of water is essential for the production of crops which makes agriculture is the largest user of water.

• Groundwater is the water found underground in the cracks and spaces in soil, sand, and rock.
• Groundwater is useful in many ways such as irrigation, drinking, washing, etc.
• Increasing population is responsible for groundwater shortage.
  
• So, the correct answer is 'Increase in population'.