Water’s worldwide travels

Scientists track the movement of ‘virtual water,’ used in the production of goods and exchanged among nations

By Stephen Ornes, 14:05 PM April 2, 2012

 

 

 

Water runs downhill from mountaintops to streams to rivers to oceans. But downhill isn’t the only way that water moves. A new study measures how water travels from country to country for human consumption. This flow isn’t the type we usually think about. These scientists looked at the water used to grow and make the products that get shipped from nation to nation as imports or exports. They call this a flow of “virtual water.”

 

We typically think about water as the liquid that flows from a ...

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