If the water crisis in Asia is not addressed it could be a significant setback to the region's economic growth, according to Asian Development Bank (ADB).
ADB says there is a widening gap between demand and supply of water, and that the estimated gap, 40% by 2030, is a reasonable expectation.
In China, India and the Philippines, per capita availability of water per year has fallen below 1,700m³, the global threshold for water stress.
The water shortage could become more serious because 80% of Asia's water is used for irrigation, which could have a serious bearing on food supplies in the region.
According to ADB, the efficiency in water usage in agriculture and industry has improved by only 1% a year since 1990, according to independent.co.uk.
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