Radio can help to create a more inclusive and prosperous society especially if young people are more represented in the medium.
That's according to UN cultural agency, UNESCO, on the fourth annual World Radio Day.
It says too few programmes are devoted to, or designed, by young people.
Radio reaches more people in more places than any other medium.
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The UN says radio is a bridge of communication for remote communities, developing regions and vulnerable populations, sometimes with no other connection to the outside world.
On this year's World Radio Day, one challenge in particular is being highlighted.
The voices of the generation under 30 years old, which accounts for more than half of the world's population, are not present enough.
Irina Bokovo is the Director-General of the UN cultural agency, UNESCO.
"By giving young people a voice, we can catalyse new energy to rejuvenate and develop societies. By supporting young people through education and training in the media professions, through media content, we can help create more inclusive and prosperous societies."
Ms Bokova added that every day, radio shapes our outlook and our imagination.
But she said UNESCO's main message is that radio can help change the world.