People Fixing The World Folgen

This is a story about how the most amazing ideas do not always work how you would like in practise. In theory it is so simple. You put disease-ridden water into a two litre plastic bottle, screw on the lid and leave it in the sun. After six hours on a cloudless day, almost all the bacteria and bugs that cause diseases like cholera and diarrhoea are killed or inactivated by the UV light and gentle warming. Professor Kevin McGuigan has proven this in the lab, but for the last 20 years he has been trying to get it working in rural African communities. It has not been anywhere near as easy as you might think.(Photo: Godfrey putting his water bottle out to disinfect in the sunshine)

A new app is helping blind people solve everyday problems by combining smartphones video technology and an army of armchair volunteers. World Hacks investigates how it works and explores whether micro-volunteering projects like this have the potential to solve all kinds of problems in the future.Presented by Mukul Devichand.Image caption: Vicky, who is blind, using an app to help her sew / Image credit: BBC

The internet is awash with made-up news stories. It’s not a new problem, but the highly charged US election campaign forced people to pay attention. This week on World Hacks we’re speaking to some of those fighting back against what they see as a threat to democracy: the fake news epidemic. We hear from guests including Le Monde’s Samuel Laurent, Democratic State Senator Bill Dodd of California, and Claire Wardle from journalism non-profit First Draft. Presented by Sahar Zand. Produced by Harriet Noble.Image caption: Close up of a computer screen showing a web address, Image credit: Lionel Bonaventure/AFP/Getty Images