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Modern tech is accused of interfering with our sleep, keeping us up late anxiously staring at our phone screens. But could a phone app provide the cure?Roughly one in three people in most developed countries typically tell surveys that the suffer from insomnia. The BBC's Laurence Knight is one of them. He seeks the advice of sleep physician Dr Guy Leschziner of Guy's Hospital in London, who explains how sleep and anxiety can become a vicious circle.The good news is that there is a new non-drug treatment that is proving remarkably successful - cognitive behavioural therapy for insomnia. The bad news is that there are nowhere near enough trained clinicians able to provide treatment. That provides a gap in the market - and one that Yuri Maricich of US medical tech firm Pear Therapeutics hopes to fill with a mobile phone app of all things.(Picture: Cell phone addict man awake at night in bed using smartphone; Credit: OcusFocus/Getty Images)

How the rise of 'microwork' is helping develop artificial intelligence. Ed Butler speaks to New York Times reporter Andy Newman about his experience on Mechanical Turk - the Amazon-owned platform that offers tiny jobs for tiny wages. Microworker Michelle Munoz explains how she makes a good living from online microwork in Venezuela. Ronald Schmelzer, analyst at Cognilytica, an AI market research firm, explains why data-labelling tasks common on microworking sites play a central role in developing artificial intelligence. And researcher and author Mary Gray warns about the impact of microwork on workers' rights.Producer: Edwin Lane(Photo credit: Getty Images)

Soil degradation is reducing crop yields and adding to climate change. It's a big headache not just for farmers, but for all of us.But fear not, as Ed Butler heads to a wheat field in eastern England where farmer Simon Cowell thinks he has a simple, counter-intuitive solution to the problem: Cut back on fertilisers and pesticides, and plough less. He claims it restored his land in two years. But if it's this simple, why isn't everyone doing it? And what happens if we don't do anything? How quickly will we run out of usable soil, and how much carbon will our soils emit into the atmosphere?The programme also features interviews with Ronald Vargas of the UN Food and Agriculture Organization; professor of soil conservation Jane Rickson of Cranfield University; and geologist David Montgomery of the University of Washington.Producer: Josh Thorpe(Picture: Close-up young plant growing in the soil; Credit: Mintr/Getty Images)