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The Chinese-owned online store has exploded in popularity in the past year, shipping to customers in 49 countries around the world. And its advertising has taken centre stage at one of the world’s most watched events: the Super Bowl. So why is Temu so cheap? And how can it afford to spend hundreds of millions of dollars on advertising to take on its rivals?We hear from experts, politicians and shoppers in China, the US, and the UK about how the company operates, as it seeks to out-pace the competition.(Picture: The Temu logo displayed on the screen of a mobile device. Credit: Getty Images)Presented and produced by Sam Gruet

The government of Uruguay has launched ambitious plans to make hydrogen and green fuels.The country generates far more of its electricity from renewables than most countries - Uruguay produces more than 90% of its electricity from sustainable resources, like wind. And that, the government says, puts it in a good position to start producing green hydrogen.Proponents of green hydrogen production in Uruguay say it will be good for the planet and the country's economy, but could it use too much water?(Picture: Mauricio Caro, a farmer in Uruguay. He worries that if water is taken from the local aquifer to make green fuels, farmers will run short. Credit: Grace Livingstone/BBC)Presented and produced by Grace Livingstone

Andy Yen is founder and CEO of tech company Proton, best known for its encrypted email service Proton Mail.He was born in Taiwan, studied in California, then moved to Switzerland to work at CERN as a particle physicist. He then set up Proton from Geneva.Dougal Shaw talks to the entrepreneur about growing up in the shadow of China, personal privacy in an age when we live our lives online, and his company’s “cat and mouse” games with Russia over VPN software, which allows people to access the internet without state control.(Picture: Andy Yen)Presented and produced by Dougal Shaw