The head of the UN Food and Agriculture Organisation made a global call last week for nations to safeguard water, calling it the source of food security. Jacques Diouf, the general director of the UN body, singled out the Horn of Africa and parts of north Africa, the Middle East and southeast Asia as particular trouble spots. The call was made to mark World Environment Day 2003, which was celebrated under the theme ‘Water - Two Billion People Are Dying For It!’