World Water Day is celebrated across the globe on 22 March and a variety of events are organised in several countries to create awareness about preserving the fast depleting sources of drinking water.

The Food and Agricultural Organisation (FAO) of the United Nations will be holding a series of discussions on the theme of World Water Day 2012 with focus on food security and water management.

Exhibitions, documentaries, musical evenings and other cultural programmes are also part of the celebrations to mark the day across the globe.

But beyond the brain-storming sessions and celebrations on a dedicated World Water Day, the stark reality remains that the majority of the global population has limited or no access to the clean drinking water.

Take a look at the photos which throw up the need for preserving every drop of water: