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The latest news, the best interviews and sporting action - in short.
More news, features and analysis from BBC News.
Chloe Tilley speaks to the app's chief technical officer, Elina Berglund, to find out.
5 Live's Liv Portas, 19, looks into the effects of growing up with social media.
From going vegan to flying less... what individually can we do to tackle climate change?
Think of a relative. Can you see them in your mind? We speak to the people who can't.
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