The workers in the engine room of big tech

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We look at revelations about outsourced tech workers in Kenya, and try to find out why more than a thousand of them have been made redundant.Also this week: are you getting the best out of artificial intelligence? Could changing "how" you communicate with AI make a difference? We speak to an author and put his recommendations to an AI test. And we hear from a company turning lamp-posts into data centres.Presenter: Chris Vallance Producer: Tom Quinn(Image: The words "Meta AI" are displayed on a smartphone screen. The phone is resting on a laptop keyboard. Credit: Reuters)