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How to save the banana

The banana is under threat from a deadly disease. Meet the people are trying to save it

• 23 mins

How to stop fires destroying whole neighbourhoods

The innovative fire alarm designed to protect South Africa鈥檚 poorest communities

• 23 mins

Stopping abuse with protection dogs

Women who have left abusive partners are learning how to train their own protection dogs

• 23 mins

Saving the world鈥檚 ice

Silica beads and whiter clouds - ideas to stop the world鈥檚 ice melting

• 23 mins

Turning kids into entrepreneurs

Children in Uganda are running their own businesses thanks to special classes in school

• 23 mins

Convicting more rapists

Rapists often get away without being convicted 鈥� South Africa thinks it has an answer

• 23 mins

Making your deliveries greener

Four clever ways to reduce carbon emissions from deliveries

• 23 mins

Checking in with the problem solvers

Stopping forest fires with goats and more 鈥� an update on projects we鈥檝e visited before

• 23 mins

How to move the Earth

The plans to use lasers or asteroids to move our planet away from the sun

• 23 mins

The pharmacists fighting high drug prices

When drug prices went up, pharmacists stepped in to make medicines themselves

• 23 mins

Forecasting volcanoes

Preparing for disasters long before they strike rather than rescuing people afterwards

• 23 mins

Running to do good

Forget the treadmill - these people have turned doing good deeds into a workout

• 23 mins

Fighting depression together

Women in Uganda are learning how to treat their neighbours for depression

• 23 mins

The miracle cure: Exercise

If exercise were a drug, almost everyone over 65 would want to take it

• 23 mins

The good lads

Working with men and boys to tackle everyday sexism

• 23 mins

Meet the neighbours

People in these flats promise to spend two hours a week together to tackle loneliness

• 23 mins

A safe place to be gay

An idea used in video games is helping LGBTQ people in the Middle East talk safely online

• 23 mins

Audience takeover:Your feedback

鈥淔abulous idea鈥� or 鈥渨aste of money鈥�? Your thoughts on solutions we鈥檝e covered.

• 23 mins

How they鈥檙e saving the kakapo

It鈥檚 a flightless bird close to extinction, but the kakapo recovery team is on the case.

• 23 mins

How to be a better dad

Teaching men to look after their babies and how this can help cut violence against women

• 23 mins

The treasure in our toilets

How human sewage is being recycled to recover a valuable chemical

• 23 mins

Regrowing the rainforest

It has taken 40 years, but this man has regrown a patch of rainforest in the Amazon

• 23 mins

The big transport swap

Would robot shuttles, buses on demand and free rides persuade you to ditch your car?

• 23 mins

Making the world a quieter place

How sound barriers and noise sensors are helping to make the planet more peaceful

• 23 mins

The farmers moving their fields indoors

We visit farmers growing lettuce, herbs and strawberries indoors in the middle of cities

• 23 mins

The great spreadsheet in the sky

How blockchain could solve some of the world鈥檚 problems.

• 23 mins

A Sporting Chance

How sport can change the lives of young people from some of the toughest backgrounds.

• 23 mins

The breath of life

A clever way to provide life-saving oxygen

• 23 mins

Electricity that grows on trees

Scientists are trying to tap unlikely-sounding energy sources - like the leaves on trees.

• 23 mins

The ancient technology getting a second wind

Wind-powered ships are sailing cargo around the world again to help cut pollution.

• 23 mins