Why is it dangerous to be a climate activist in Colombia?

Colombia is one of the most biodiverse countries in the world. But it’s also the most dangerous to be an environment activist. A report from Global Witness, a non-governmental organisation, says Colombia has the highest number of murders of green activists anywhere in the world.

The BBC’s Maria Clara Montoya has spoken to two young climate defenders - why are they at risk and what is being done to protect them?

(09:20) Also, scientists in the US are analysing dust collected from the Bennu asteroid - one of the most dangerous rocks in the solar system. Our Science Editor, Rebecca Morelle, takes us through what experts have learnt so far.

Email: whatintheworld@bbc.co.uk WhatsApp: +44 0330 12 33 22 6 Presenters: Hannah Gelbart with Maria Clara Montoya Producers: Emily Horler, William Lee Adams, and Benita Barden Editors: Simon Peeks and Verity Wilde