Talks about net zero have been getting heated in the UK. It’s after the Prime Minister Rishi Sunak said he was still confident the country would hit net zero by 2050 — despite announcing changes to scale back some of the government’s key green policies.

If you're confused about net zero and how to get on track to meet targets, Alex and Jordan Dunbar can help. Jordan is a presenter on The Climate Question podcast. He spells out the basics and helps assess the progress of the world’s biggest polluters — China, the United States and India.

Also, NASA scientist Dr Jason Dworkin talks about the Bennu asteroid. The Osiris-Rex space mission left Earth in 2016; it scraped dust and rock from the asteroid three years ago and yesterday the sample landed in a Utah desert. He explains how it might answer some of the questions about life on this planet. .

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