Australian ultrarunner Mina Guli is currently in the middle of a monumental undertaking: over the course of 40 days, she aims to run 40 marathons on six continents along six of the world’s major waterways.

And though she loves running, she isn’t doing it just to “push her body or set new records.” Rather, she is doing it to draw attention to the world’s water crisis. While most people know that access to clean, potable drinking water is a major issue in much of the world, the problem is actually more far-reaching the further into the future one looks. It is a problem of scarcity. “Most people don’t know that by 2030, there will be a 40% difference between the demand for water and the supply available,” Australian ultrarunner Mina Guli told The Outdoor Journal. With her 6 River Run expedition, in which she will run the equivalent of 40 marathons on six continents along six rivers in 40 days, Guli is hoping to inject a greater sense of urgency into the conversation around this problem. [caption id="attachment_7865" align="aligncenter" width="2400"] Mina Guli participating in the 7 Deserts Run4Water expedition in Mojave Desert, USA, during March 2016.