"Globally, water usage has increased by six times in the past 100 years and will double again by 2050, driven mainly by irrigation and demands of agriculture. Some countries have already run out of water to produce their own food. Without improvements ... the consequences will be even more widespread water scarcity and rapidly increasing water prices," said Frank Rijsberman, director of the institute.
Stockholm - With the world's population forecast to grow by two to three billion by 2050, there has to be a radical transformation in the management of the planet's resources of water, experts have warned at the start of World Water Week here.
"One in three people is enduring one form or another of water scarcity" in the world today, according to a report compiled over five years by 700 experts and presented at the opening of the event in the Swedish capital.
"It is much more widespread than we thought at first," said Frank Rijsberman, director-general of the International Water Management Institute.
It takes one litre of water to produce one calorie of food
