People Fixing the World

Bananas are one of the most popular fruits on the planet - more than 100 million tonnes of them are eaten every year. But on banana plantations on four continents, a deadly fungus is creeping through the soil and destroying the plants. Some say the end is nigh for the banana. But from Australia to Colombia and from the Philippines to the Netherlands, work is going on to stop that happening. We meet the farmers, scientists and gene technologists trying to find a way to save the fruit. Reporter: Daniel Gordon (Photo Credit: BBC)

Billions of tonnes of goods are moved by lorry every year – everything from food and clothes to building materials, electronic gadgets and toys. Most heavy-duty vehicles run on diesel and they account for a quarter of the EU’s CO2 emissions from road transport. But making eco-friendly lorries and trucks is challenging. Big vehicles need big batteries, which currently take too long to charge and take up too much room. So Germany is trying out a few alternatives. The eHighway system enables lorries to connect to overhead electricity cables, just like trams and trains. And while lorries are connected, smaller on-board batteries could be charged up too to power the final leg of a journey. The country is also investing in another technology: hydrogen. Fuel cells convert the gas into electricity and the only emissions from these vehicles are water vapour and warm air. Seventy-five hydrogen fuel pumps have already opened across the country. Reporter: William Kremer

Video games are often blamed for time-wasting and violence, but there’s a group of people proving this stereotype wrong. We meet the scientists behind a game designed to speed up finding a treatment for Alzheimer’s disease, and we speak to a teenager who plays it because “it’s something I can do to help people in my spare time”. Citizen science projects like this have had some remarkable successes, and gamers have been credited with significant research such as figuring out the structure of a protein that shares similarities with HIV. Fans of this model believe gaming has a huge part to play in the future of problem solving. Produced by Kathleen Hawkins (Photo Credit: Getty Images)

The city of Vaasa in western Finland has built a reputation as a centre of innovation, where energy companies are working together to try to find solutions to some of the world’s biggest problems. Here, there’s a quiet conviction that climate change can be stopped and a belief that technology emerging from this area will help us make the shift to renewable forms of energy. We meet the people behind a giant engine that can run on a variety of non-fossil fuels, hear about a portable plant that turns waste into energy and speak to scientists developing man-made fuels to replace oil and gas. We also check out a company creating a new type of battery which it hopes will one day be able to store enough power to meet the needs of a whole city. Reporter and producer: Erika Benke (Photo credit: BBC)

Imagine a grocery shop selling all your basic goods at a discounted price… and if you buy enough you also get free health insurance. It might seem too good to be true, but stores like this have been introduced at some factories in Dhaka, Bangladesh. Social entrepreneur Saif Rashid is trying to get better health care to some of the millions of garment factory workers who are on low wages. For them, to lose a day’s pay by taking time off sick can be disastrous and affording decent health care is almost impossible. Now, with this scheme, they can get health insurance at the same time as getting discounts on their shopping. We find out how it’s changed some workers’ lives and why some people don’t take up the opportunity. Reporter: Chhavi Sachdev Producer: Tom Colls (Photo Credit: BBC)