Water specialists from across the globe will converge at the Hague in Netherlands for a week-long conference dubbed as the "the most important international water meeting ever held" beginning March 27. The Ministerial-level meeting titled "From vision to action" will discuss ways to tackle the world's water crisis, especially in the developing world, where 20 per cent more water is needed than available for the three billion people who will be needed to be population by 2025.