Who introduced the concept of virtual water?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. John Anthony Allan.
The concept of virtual water was introduced by John Anthony Allan, a British geographer and water resource management expert, in the 1990s. Virtual water refers to the hidden water used in the production of goods and services, particularly in agriculture. For example, the water required to produce food or other products is embedded in them, even if it is not directly visible. This concept helps in understanding global water trade and its implications on water-scarce regions. Allan was awarded the Stockholm Water Prize for his work.