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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

No more bosses

How do you make work a better place? Get rid of managers, say some companies.

• 23 mins

Kids fixing the world

Clever inventions by children that could improve our lives, from apps to robots

• 23 mins

Personality tests for loans

How an online test and a phone might be able to help some people with their finances.

• 23 mins

How tech is tackling wildlife trafficking

The exciting new tools helping to save some of our most endangered animals.

• 23 mins

A future without bees

High-tech alternatives to bees include spraying pollen from drones to pollinate plants

• 23 mins

How to get everyone online

Balloons and satellites could help more people get on to the internet

• 23 mins

New uses for old solutions

How two life-saving apps were adapted to fix problems caused by the Covid-19 pandemic

• 23 mins

Financing the forests

Making rainforests a profitable investment

• 23 mins

Prison Voicemail: Messages from behind bars

Prisoners and their families are keeping in touch with the Prison Voicemail app

• 23 mins

The tech doctors forecasting heart failure

Implanted devices can predict when something is about to go wrong with a patient鈥檚 heart

• 23 mins

Keeping data forever

Three radical new ways to save data 鈥� in DNA, glass and magnets

• 23 mins

A happier planet

Looking for the happiest places in the world and finding out what makes them happy

• 23 mins

Smartphones saving the rainforest

Old mobile phones are being used to catch illegal loggers in the rainforest

• 23 mins

How to prevent drowning

AI to help lifeguards in Israel and weather forecasts for fishermen on Lake Victoria

• 23 mins

Getting rid of AI bias

Better facial recognition and changing algorithms - how to fight racial bias in AI

• 23 mins

Training police to patrol each other

US police are being taught what to do if they're worried about a colleague鈥檚 actions

• 23 mins

How jellyfish can help us

Jellyfish could be used to filter microplastics from water and develop new medicines

• 23 mins

How to put the internet in a box

Inside the 鈥渟neakernet鈥� - the people carrying websites to places that are off the grid

• 23 mins

Saving Cape Cod鈥檚 dolphins

Saving dolphins from stranding on beaches - we meet the team improving survival rates

• 23 mins

Teenage inventor special

Brilliant ideas from school kids to help solve crime, make life safer and much more

• 23 mins

Audience takeover: Your questions answered

Answers to your questions about regrowing the rainforest and other stories we鈥檝e covered

• 23 mins