President Biden sets out his climate change agenda

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President Biden has signed executive orders to tackle climate change. The new climate envoy John Kerry speaks to the BBC and we also get a reaction from a representative of oil and gas interests in the US and from an environmental group. A WHO team is starting its investigation of the origin of the Covid-19 virus in Wuhan, after their two weeks in quarantine - we go live to Wuhan. And two young Kenyans describe their design for a robotic arm powered by brain signals and designed for people with disabilities.