People Fixing the World

Parents struggling with childcare costs in London are banding together to care for each other’s kids. They run a super-cheap nursery where mums and dads take on half of the childcare. It’s a throwback to the childcare movement of the 1970s but can it work in the modern age?Presented by Sahar Zand. Produced by William Kremer.Image: Drawing of a family / Credit: BBC

There are no sewers in Haiti. 26% of Haitians have access to a toilet, so a lot of the sewage ends up in the water supply. Currently, Haiti is battling the biggest cholera epidemic in recent history and thousands are dying. We travel there to meet a team of women who are trying to solve this massive problem. They have set up an NGO called Soil which delivers dry, compost toilets to peoples’ homes. Alternatives to water guzzling flushing toilets - which need infrastructure such as sewers - are drastically needed in many parts of the world. And there’s a bonus to this scheme too.Also on the programme, a radical suggestion for airports: build circular runways. Are the current straight ones really the best way to take off and land?Presenter: Sahar Zand Reporters: Gemma Newby & Dougal Shaw Producer: Charlotte PritchardImage: The women of Haiti who work for the NGO Soil / Credit: BBC

Could we build cities using solar panels instead of walls? That’s the dream that Huang Ming, a wealthy entrepreneur in China’s Shandong province, has had since the 1980s. He’s become known as the ‘Sun King’ after building a vast solar park, including a showcase hotel, to prove a new kind of solar architecture is possible. So why hasn’t it caught on? We check into a room in the solar hotel and examine the vision and sometimes unfulfilled dreams of solar architecture in China. Plus, why do bins in Copenhagen have shelves built into them? Clue: it helps the city’s poorest people.Presenter: Mukul Devichand Reporters: Emma Wilson and Harriet Noble(Image: Huang Ming and his solar hotel, Credit: BBC)

An innovative housing project in Amsterdam is attempting a new way of integrating refugees into the local population. In prefab flats, refugees from the Syrian war live next door to young people in need of cheap rent. They eat together, learn language together, and develop the networks that researchers say are critical to successful integration.Presenter: Charlotte Pritchard Reporter: Jo MathysImage: Young people living in the Startblok / Credit: BBC

Air pollution is a huge problem for China, but did you know it’s actually getting better? The Air Quality Index in several cities is improving, because of a variety of experimental projects that are being rolled out. In this special edition of World Hacks as part of the #SoICanBreathe season, we are in Beijing to gather together some of the thinkers and entrepreneurs leading China’s efforts to clean its air. We work through their ideas with an audience of students and entrepreneurs, as well as hearing reports about clever pollution solutions from around the country.Presented by Mukul Devichand and Vincent Ni. Additional reporting by Emma Wilson and Ruhua Xianyu.Image: A woman wearing a face mask in central Beijing / Image credit: BBC

Voter turnout is a problem around the world, particularly in local elections. But a small group of academics and activists in the US are experimenting with a new way of getting people to turn up and put their cross in a box – a lottery. Every voter is entered and one lucky winner gets a big cash prize. World Hacks investigates whether it works.Presenter: Kathleen Hawkins Reporter: Gemma Newby Producer: Tom CollsImage caption: Lottery balls about to be drawn, Image credit: Thomas Samson / Stringer / Getty Images

Food waste is a massive global problem: the EU alone throws away 88 million tonnes a year. Much of this ends up in landfill and produces dangerous greenhouse gasses which contribute to climate change. In Europe 53% of food waste comes from households, and one woman has made it her mission to stop Danes throwing away food. We travel to Copenhagen to meet Selina Juul, a key part of Denmark’s food waste revolution.

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