Which paper introduces the water footprint concept tied to global consumption?

• A. Groom 2021
• B. Gruber 2011
• C. Hoekstra 2012
• D. Victor 2020

Answer: (C)

The idea being tested is how to measure freshwater use in the context of what people actually consume, not just what happens to be drawn within a country. This means tracking the water embedded in goods and services through global supply chains—the water required to produce things people buy, including imports and exports. It shifts the focus from domestic water withdrawals to a consumption-based view of water use, highlighting how consumption in one country can drive water use in other regions (the virtual water carried by trade).

That concept was formalized in the paper by Hoekstra and colleagues in 2012, which lays out the framework for the water footprint of nations and explains how to quantify the freshwater use linked to a country’s consumption on a global scale. It ties the idea directly to global consumption patterns and trade, making it the key reference for understanding consumption-based water accounting. The other options pertain to related topics or later developments but do not introduce this global-consumption framing of the water footprint.