Removing the mineral phosphorus from water could be more important than worrying about oil or global warming, says the winner of a top Asian prize for water research.
Dr James Barnard says nutrient removal could have big implications for food and global security,
The South African scientist won this year's Lee Kuan Yew Prize - the equivalent of the Nobel Prize for water.
But speaking to ABC radio in Australia, Dr Barnard warned that as populations increase - and water becomes more scarce - the price we pay for water will rise. Full story
