Data on trade in industrial products have been taken from the World Trade Organization
(WTO 2004). Virtual water imports and exports have been calculated by multiplying
monetary data on international trade in industrial products ($/yr) by country specific data
on the average virtual water content per dollar of industrial products (m3/$). The latter has
been calculated per country by dividing the water withdrawal in the industrial sector (FAO
2003) by the added value in the industrial sector (World Bank 2004). In this approach, all
industrial products are included implicitly.