Why did it take over twenty years for the UN's marquee climate conference to start talking about water? "It's undervalued and therefore, it's not getting the attention it deserves because people don't see the actual value addition of engaging with it," says James Dalton of the International Union for the Conservation of Nature.

"Roundabout 90% of global water policy is out of date," says James Dalton of the International Union for the Conservation of Nature. "We're effectively 40 years behind where we need to be on the policy calendar when it comes to being able to better manage our water resources."