How do you measure the global water crisis? When it comes to climate change, many people are familiar with the 1.5°C metric from the Paris Climate Accords, but is there an equivalent for water? In a discussion with Ian Bremmer on GZERO World, UN-Water Chair Gilbert Houngbo delves into the complexity of measuring the global water challenge and evaluating solutions for the future.

UN-Water is a consortium of dozens of UN agencies working together to address the water crisis and figure out the best way to meaure progress. Houngbo notes that metrics like access to drinkable water, sanitation, and water reuse are a good start. But the worst water scarcity problems are in rural areas, where the data quality is challenging.