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Marlee Dias, who was named after the reggae singer Bob Marley, was born in Philadelphia

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in the United States, to parents of Caribbean descent, and grew up in New Jersey.

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At the age of 11, she complained to her mother that in all the books she was asked to read

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at school, the protagonists were always white children or dogs.

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Her mother suggested that instead of just complaining, she should try to do something

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about it.

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decided to launch a campaign called Hashtag 1000 Black Girl Books in order to call public

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attention to the lack of diversity in children's literature and to promote the idea of featuring

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black girls as the main characters.

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Her goal was to collect 1000 books and donate them to different communities.

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The project became a global sensation, and since the launch of the campaign, more than

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13,000 books with black girls as the main character have been donated to libraries,

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schools, and community organizations around the world. She also has spoken about her project to

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inspirational women such as Michelle Obama and at many other high-profile events.

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Her aim is to ensure that kids know that changing the world should not be something that feels

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imaginary, but something that they actually have the power to do.

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Rishabh Jain is from Portland, Oregon, in the USA.

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When he was a young teenager, a close family friend died of pancreatic cancer.

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This cancer is one of the most difficult to treat because the pancreas sometimes gets

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obscured by other organs in the body, and this makes it very difficult for doctors to

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kill all the diseased cells while sparing as many healthy ones as possible when reshab heard about

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the low survival rate for patients with pancreatic cancer he decided he wanted to do something about

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it he developed an algorithm that uses artificial intelligence to accurately locate and track the

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pancreas the algorithm won the top prize in a competition called the discovery education 3m

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young scientist challenge and at the age of only 14 he was named america's top young scientist

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with the money he won from the competition reshab set up a non-profit organization to promote

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stem subjects among disadvantaged children and raise awareness of pancreatic cancer

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he continues to be interested in the importance of stem education for young people

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and the potential of artificial intelligence in medicine and is now an expert for science

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and research on various global committees bali in indonesia may be a dream holiday destination

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with its beautiful beaches and clear water however bali has a less glamorous side

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the island has a serious problem with plastic pollution

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When sisters Malati and Isabel Wyson, then aged just 10 and 12, were swimming one day at their

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local beach in Bali, they found themselves surrounded by plastic bags. They were so

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upset by the situation that they decided to try to do something about it. Their heroes were people

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who had done things to change the world. Nelson Mandela, Princess Diana, and Gandhi. So, inspired

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Inspired by them, they set up a campaign called Bye Bye Plastic Bags, which has been instrumental

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in the fight to ban plastic bags on Bali.

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Through a range of activities, including petitioning both online and offline and distributing environmentally

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friendly bags with fellow teens, the sisters' campaign gained international attention, including

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the support of the United Nations and conservationist Jane Goodall.

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As a result of their campaigning, in June 2019, the governor of Bali banned plastic

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bottles and packaging on the entire island.

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Since then, the sisters have spoken at many international conferences, and Malati has

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made a film, Bigger Than Us, which follows young activists around the world who have

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already made a difference.

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Their latest project is YouthTopia, a learning platform empowering a new generation of young people to become changemakers.