Consider the following pairs:

  1. Grey water footprint→ Volume of freshwater required to dilute pollutants to such an extent that the quality of the water remains above agreed standards
  2. Blue water footprint→ Volume of surface and groundwater consumed as a result of the production of a good or service
  3. Green water footprint→ Volume of rainwater consumed during the production process

  Which of the above is/are correct?

Answer: [D] 1, 2 & 3

All of the above are correct
Green water footprint is particularly relevant for agricultural and forestry products. Blue water footprint refers to consumption of the volume of freshwater used and then evaporated or incorporated into a product. Grey water footprint is defined as the volume of freshwater that is required to assimilate the load of pollutants based on existing ambient water quality standards.

This question is a part of GKToday's Integrated IAS General Studies Module