Water is a vital resource the world can't live without, yet it's something we often overlook. Did you know that there is only one ocean on Earth? It's true. It might have a different name depending on where you are in the world––Atlantic, Pacific, Indian––but they're all connected. And they cover a staggering 71% of our planet's surface, representing 96% of all water on earth.

Freshwater, the kind we need to survive, is becoming scarcer every day, Ian Bremmer explains on GZERO World. Climate change and increasing demand for water are putting pressure on one of the world's most precious resources. As a result, droughts and severe water scarcity are becoming more common.