In fact it takes 3,000 to 5,000 litres of water to grow just one kilo of rice
Population growth alone will push an estimated a further 17 countries, with a projected population of 2.1 billion, into water-short categories within the next 30 years.
By the year 2025, 48 countries will be affected by water stress or scarcity - affecting around 35% of the projected global population in that year.
"Water demand already exceeds supply in many parts of the world, and many more areas are expected to experience this imbalance in the near future."
Map showing coloured areas in the world suffering from physical or economic water scarcity. (Economic scarcity is where there is enough in-country water, but heavy investment needs to be made to ensure there will be no eventual physical water scarcity).