Mari Copeny - also known as 'Little Miss Flint' - became an activist at the age of 8 when the water supply in her home town of Flint in Michigan was contaminated with lead. She rose to the public spotlight when her letter to President Obama about the water crisis prompted him to visit the city and see it for himself. Now she is fighting to help other communities across the United States who are unable to access clean and safe water. BBC My World makes content about global issues for youth audiences around the world. This channel is brought to you by executive producers Angelina Jolie and the BBC World Service to show you the news behind the headlines, how to fact-check stories and spot fake news. Subscribe to #BBCMyWorld here: null #cleanwater #water #flint