Extra Virginity - Tom Mueller

Tom Mueller, the author of 'Extra Virginity: The Sublime and Scandalous World of Olive Oil'.

NZ olive oil

With New Zealanders drizzling and frying their way through about 4 million litres of olive oil every year how easy is it to find fresh, good quality, extra virgin olive oil in New Zealand? Dr Laurence Eyres is Chairman of the Oils and Fats Specialist Group of the New Zealand Institute of Chemistry.

Clean tech and geoengineering

The Guardian's environment editor John Vidal has just been looking at shortages of the rare minerals that go into things like solar panels and electric car batteries.

The Hearing House

The Hearing House is a charity based in Auckland that's using hi-tech cochlear implants to help deaf and hearing impaired children to listen and to speak.