主播大秀

Tackling sport鈥檚 concussion problem

How the latest technology is helping to tackle head injuries in sport

• 23 mins

The secret to making your stuff last longer

Clever ways to persuade people to fix old things instead of throwing them away

• 23 mins

The magic greenhouse

A greenhouse powered by the wind has made it possible to grow crops on arid land

• 23 mins

Using satellite photos to help distribute cash

Togo has found a new way to send emergency cash to people struggling in the pandemic

• 23 mins

How to reuse a demolished building

Can you construct a building by reusing materials from ones that have been knocked down?

• 23 mins

Watching out for Gran with help from her toaster

How we could improve care for the elderly by monitoring their use of home appliances

• 23 mins

Helping animals cross the road and other obstacles

The special bridges that are helping to save slow lorises and reunite rare monkeys

• 23 mins

Shred it yourself: The DIY plastic recyclers

Machines to shred, melt and mould waste plastic are popping up around the world

• 23 mins

Pedal power: How bicycles can change lives

One man鈥檚 mission to transform millions of lives by selling them bicycles

• 23 mins

The detection dogs tracking poachers and Covid-19

Marlo is sniffing out coronavirus in the UK, and Thor is tracking poachers in Tanzania

• 23 mins

The forest sound detectives

Scientists are checking up on the health of forests by analysing the sounds in them.

• 23 mins

Turning oil platforms into reefs

A home for marine life, but perhaps not in the place you鈥檇 expect

• 23 mins

Catching up with the problem solvers

Are stickers still saving lives? Was a coral reef repaired?

• 23 mins

Turning the desert green

One man's plan to make the Sinai desert fertile

• 23 mins

The helpline for jealous and violent men

A helpline for jealous and violent men is aiming to cut domestic violence

• 23 mins

Smashing the glass ceiling for young Africans

How a network of mentors is helping young Africans achieve their dreams

• 23 mins

Test-tube rhinos

Scientists have an incredible plan to save the northern white rhino from extinction

• 23 mins

The career where it helps to have a criminal past

Ex-cons are running part of the US probation system, and it鈥檚 transforming young lives

• 23 mins

The great mosquito swap

An innovative new weekly programme looking at how we can solve the world's problems.

• 23 mins

How five friends can change a refugee鈥檚 life

Groups of Dutch friends are helping families settle when they move to a new country

• 23 mins

Unsung victories in the fight against disease

Remarkable successes against some of the most unpleasant illnesses on the planet

• 23 mins

The ATMs that dispense clean fuel

How a start-up in Kenya reinvented the cooking stove

• 23 mins

Turning preachers into LGBT allies

How a group of Kenyans reduced homophobic hate and violence

• 23 mins

Locust hunters

People in Kenya have been paid to catch swarms of locusts eating farmers鈥� crops

• 23 mins

The seaweed farmers adapting to warming seas

How seaweed farmers in Zanzibar are fighting the effects of climate change

• 23 mins

Ways to save the planet: Swap concrete for wood

We investigate the power of nature鈥檚 own creations to help fix climate change

• 23 mins

Ways to save the planet: Fridge detectives

We meet detectives hunting down old fridges to stop greenhouse gases escaping from them

• 23 mins

The library where the books are people

Borrow a stranger for a half-hour chat to challenge your prejudices

• 23 mins

The hotel for homeless people

When the coronavirus pandemic hit, England鈥檚 rough sleepers were offered a place to live

• 23 mins

Robots on the beat

How police in the US are using tech, including robots, to fight crime

• 23 mins