What is the relatively clean waste water, such as from kitchen and laundry cycles are called?

The part of total precipitation that keeps the soil moist is called:

What is the total volume of water that is used to produce the goods and services consumed by the inhabitants of the nation called?

Which of the following countries has higher per capita water footprint?

Which of the following is the least effective irrigation system in terms of conservation of water?

What is the process of creating fresh water by removing saline from bodies of salt water called?

Which of the following is the largest source of drinking water on a global scale?

In developed countries, majority of the total water consumption is used for which purpose?

What is the average yearly precipitation onto the surface of the Earth?

Which of the following determine water footprint of a country?