1. Virtual Water and Water Footprints in a Global Perspectives
... consists of three components: the blue, green and gray water footprint. The blue water footprint is the volume of freshwater that evaporated from the global blue water resources namely surface water and ground water. The green water footprint is the volume of water evaporated from the global green water resources coming under rainwater stored in the soil as soil moisture. The gray water footprint is the volume of the water that becomes polluted during ... the production process of goods and services. The water is considered virtual because once a crop is grown the real water used to gro...
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