How to change the world - with teen activist Marley Dias

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At the age of just 10, Marley Dias began a campaign to collect a thousand books featuring black girls as lead characters - because she couldn't see anyone like her in the books she read - a young strong black female. Her #1000BlackGirlBooks campaign went on to collect over 11,000 books. And at 14 she's now written her own - a book on how to make a difference in the world. Nihal Arthanayake spoke to Marley and her mum, Dr Janice Johnson Dias. Photo: Andrea Cipriani Mecchi