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The cannabis extract CBD or cannabidiol is legal in many countries, and now it's finding its way into everything from soaps to cosmetics. But is it just a fad, and are its health claims bogus?Manuela Saragosa asks Harry Sumnall, professor in substance use at Liverpool John Moores University, whether it is true that CBD is not a psychoactive substance - unlike the more infamous cannabis extract THC. And is it true that it can be used to treat the symptoms of Alzheimer's, anxiety and cancer amongst others?Meanwhile Katie Prescott explores the booming market for CBD products. She speaks to Jim McCormick, president of cannabis brand Ignite International; Eveline van Keymeulen, head of life sciences regulations at law firm Allen & Overy; Alex Brooks of financial services firm Canaccord Genuity; and Chris Tovey of GW Pharmaceuticals.(Picture: Cannabis leaf; Credit: digihelion/Getty Images)

The attorneys general of 48 out of the 50 US states have come together to challenge the control of the search giant over what we buy or view online.Manuela Saragosa speaks to the BBC's technology correspondent Rory Cellan-Jones about why the US anti-trust authorities have decided to join their EU counterparts in taking on Google.Jonathan Tepper, author of the new book The Myth of Capitalism: Monopolies and the Death of Competition, takes us through the history and significance of anti-trust legislation. But are anti-monopoly laws equipped to deal with the tech giants of today? And can these companies even be called monopolies? We'll also hear from Sally Hubbard of the Open Markets Institute, and Alex Moazed, co-author of the 2016 book Modern Monopolies.(Picture: The Google logo displayed through a magnifying glass; Credit: Chesnot/Getty Images)

Sperm counts worldwide have been in steady decline for decades, and a group of tech start-ups are finally giving the problem attention.Manuela Saragosa speaks to the heads of two such companies: Tom Smith of Dadi Inc, which provides home kits for freezing sperm, and Mohamed Taha of Mojo Diagnostics, which is using artificial intelligence to make male fertility testing more reliable. Plus Mylene Yao of Univfy Inc, which focuses on female fertility, says she has noticed a generational shift in her clients' attitudes, with much more focus now on the joint responsibility of men in achieving a pregnancy.But why is there such a crisis in male fertility in the first place, and what can men do to improve their chances of having a child? Manuela asks Professor Richard Sharpe of the Centre for Reproductive Health at Edinburgh University.(Picture: Human sperm and egg cell; Credit: koya79/Getty Images)