Advances and Challenges in the Water Footprint Assessment Research Field: Towards a More Integrated Understanding of the Water–Energy–Food–Land Nexus in a Changing Climate.

More recently, since the publication of the first study on the impact of diet on the WF [[38]], the WF of diets research has boomed. Water footprint (WF) assessment has developed into a fundamentally interdisciplinary and integrative research field [[9]]. At the global level, the blue WF related to the production of food waste is about 250 billion m SP 3 sp , which is 3.6 times the blue WF of the USA's total consumption [[9]]. 10.1073/pnas.0812619106 13 Gerbens-Leenes P.W., Hoekstra A.Y., Van der Meer T.H. The water footprint of energy from biomass: A quantitative assessment and consequences of an increasing share of bio-energy in energy supply. [Extracted from the article]