Mexico City was built on an ancient lake and gets more rain than London, but it's still running out of water. For millions of its poorest residents, getting enough is a daily challenge. To solve this critical problem, Social enterprise project Isla Urbana is capitalizing on the city's abundant rainfall with home-harvesting systems designed to help the most vulnerable. #GameChangers #MexicoCity #BloombergGreen ------- Like this video? Subscribe to Bloomberg on YouTube: http://www.youtube.com/Bloomberg?sub_... Become a Quicktake Member for exclusive perks: http://www.youtube.com/bloomberg/join Follow Bloomberg for business news & analysis, up-to-the-minute market data, features, profiles and more: http://www.bloomberg.com Connect with us on... Twitter: / business Facebook: / bloombergbusiness Instagram: / bloombergbusiness QUICKTAKE ON SOCIAL: Follow QuickTake on Twitter: twitter.com/quicktake Like QuickTake on Facebook: facebook.com/quicktake Follow QuickTake on Instagram: instagram.com/quicktake Subscribe to our newsletter: https://bit.ly/2FJ0oQZ QuickTake by Bloomberg is a global news network delivering up-to-the-minute analysis on the biggest news, trends and ideas for a new generation of leaders.