We hear from Peter Gabriel, who is endorsing a competition to find a way of decoding animal communications using AI and then talk back to them. We get more details of the challenge from the chair of the prize, Prof Yossi Yovel. Microplastics in our seas and drinking water is a real problem. Two teenage students from Texas have found an innovative way to get rid of the stuff using ultrasound. If you have not heard about the Global Digital Compact, we speak to someone who says you need to know about it. And a traditional Indian instrument gets an electronic makeover. Presenter: Chris Vallance Producer: Tom Quinn (Photo: Musician Peter Gabriel performing in New York. Credit: Theo Wargo/Getty Images)