Fishing boats that trawl the ocean floor, release as much carbon dioxide as the entire aviation industry, according to a groundbreaking study.

Team UK and Sir Ben Ainslie have been confirmed as the Challenger of Record for the next America's Cup and there is speculation that the challenge may be held offshore... it's just a rumour at the moment but The Times of London reported "the fascinating idea of a one-off defence against Ben Ainslie's crew on the Solent has been mooted"   Ed Carrell is a Kiwi who has lived in the UK for 20 years -  and is here supporting INEOS Team UK and Sir Ben Ainslie. He lives near the Solent, which is the strait that separates the Isle of Wight from Great Britain.

The Government today announced that local Councils will no longer be in control of the country's water fluoridation, with Director-General of Health Dr Ashley Bloomfield making the decisions from here on in.Water fluoridation is the controlled adjustment of fluoride to a public water supply ... it is introduced into the water to reduce tooth decay. Dr Matthew Hobbs is a senior lecturer in Public Health at the University of Canterbury. He's also a senior research fellow in the geohealth laboratory at Canterbury

In Karyn's weekly catch up with the Mediawatch team, Hayden Donnell captures the media's America's Cup delerium today before heading to the Australia's Channel 9 coverage of a story last week on the New Zealand-born criminals being deported from Australia after committing crimes. The "taking the trash out" comment from Australia's Home Affairs Minister Peter Dutton and New Zealand's response to the comments and the flights, including reports of a 15-year-old boy being deported.

Emirates Team New Zealand has won the 36th America's Cup and the Auckland Viaduct Village and environs have erupted with celebrations. There was a call this afternoon that the Viaduct Village had reached capacity and for people to head to other parts of the Auckland waterfront. Karyn speaks with Steve Armitage, Auckland Unlimited General Manager Destination.

Rotorua is planning to spend hundreds of thousands of dollars on security cameras to try and curb problems with violence and anti-social behaviour, which are being blamed on rough sleepers. A crime statistics report released last year rated the Rotorua area worst among 66 regions. Rough sleepers are getting a lot of the blame for antisocial or violent behaviour, so are the so-called 501 deportees from Australia. Rotorua Lakes Mayor, Steve Chadwick joins Karyn to explain the problem.

The number of New Zealanders with type 2 diabetes is expected to increase by 70 to 90 percent over the next 20 years if nothing is done to address the growing epidemic. A PwC report commissioned by Diabetes New Zealand and several health organisations has found the cost of the disease could balloon to $3.5 billion by 2040 if better systems are not put in place. Karyn speaks with Diabetes New Zealand's chief executive, Heather Verry.

Commentator for the 36th America's Cup, Peter Lester, speaks with Karyn about today's racing and his reference to the "Nga Pipi shift" as a way of describing some of the signature wind changes on the Waitemata Harbour that gave Team New Zealand the advantage in today's first race and meant the second race couldn't proceed.

Team New Zealand has one hand on the America's Cup after going 6-3 up, with another victory over Luna Rossa today in race nine on the Waitemata Harbour in Auckland. But only one race was possible - celebrated yachtswoman and sailing coach Penny Whiting joins Karyn to talk about the conditions on the water today.

A research company, Neuralink, which is owned by Billionaire Elon Musk, claims to have found a way to help tetraplegics use thought control to move robotic limbs, It's called Brain-Machine Interface technology and Elon Musk is calling it a "sort of symbiosis" between humans and artificial intelligence. Otago University's Associate Professor Alistair Knott is a specialist in cognitive science and artificial intelligence.