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Definition: How can virtual water be calculated for different products?

Calculating virtual water for different products involves assessing the water inputs required at each stage of the product’s life cycle. This includes the water used in growing raw materials, manufacturing processes, packaging, and distribution.

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To calculate virtual water, various factors need to be considered, such as the water intensity of the production process, the geographical location of production, and the water scarcity of the region. These factors help determine the amount of water embedded in the final product.

One common method used to calculate virtual water is the Water Footprint Network’s Water Footprint Assessment. This approach takes into account three components: green water (rainwater consumed during crop growth), blue water (surface and groundwater used for irrigation), and grey water (water required to dilute pollutants generated during production).

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By quantifying the virtual water content of different products, policymakers, businesses, and consumers can gain insights into the water footprint associated with their choices. This information can inform decision-making processes, promote water-efficient practices, and contribute to sustainable water management strategies.

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