09:05 New Zealand's dirty water. The Auditor General warns that councils are failing to deal with runoff from dairy farms

Kevin Parris from the OECD Trade and Agriculture Directorate who is undertaking a report on the impact of dairy run off in countries including New Zealand.

09:15 NZRFU says RWC model has to change

Steve Tew, NZ Rugby Football Union chief executive.

09:25 Voluntary student union membership

David Do, co-president of the NZ Union of Student Associations; and Lauren Brazier, spokeswoman for Student Choice, a group promoting voluntary membership of student associations.

ACT MP Heather Roy's Education (Freedom of Association) Bill, which ends compulsory membership, is due to pass its third reading today (Wednesday) - what are the pros and cons of making student union membership not compulsory?

09:45 Australia correspondent Karen Middleton

The Australian Government has announced the previously foreshadowed change to rules so women can serve in so-called frontline jobs in the Australian Defence Force in five years.

10:05 Astrophysicist and science communicator Ray Jayawardhana

Ray Jayawardhana, Sri Lankan-born Professor of Astronomy and Astrophysics at the University of Toronto and author of Strange New Worlds: The Search for Alien Planets and Life Beyond Our Solar System and nearly 100 popular articles.

10:25 Book Review with Rae McGregor

A Trick of Light by Louise Penny
Published by Sphere

10:45 Book Reading: Shingle Beach by Carl Nixon (Part 3 of 5)

A portrait of a family at their bach, told from five different points of view. The location connects them but the perspectives are very different.

Audio will be available here after broadcast

11:05 Marty Duda's Artist of the Week

It’s been 20 years since Nirvana’s Nevermind was released. For many, it’s the last rock album that really mattered. It certainly affected a generation searching for their own sound and their own spokesman. Nirvana’s rein was short and explosive but it’s impact it still felt today.

1. About A Girl (2:48) - Nirvana taken from 1989 album, "Bleach" (Sub Pop)
2. Lithium (4:17) - Nirvana taken from 1991 album, "Nevermind" (DGC)
3. All Apologies (3:50) - Nirvana taken from 1993 album "In Utero" (DGC)
4. Where Did You Sleep Last Night?(5:08) - Nirvana taken from 1994 album "MTV Unplugged In New York" (DGC)

Marty has a previously unreleased version of In Bloom on his website: www.13thfloor.co.nz

11:30 Law commentator James Dunne

Election advertising.

11:45 Arts commentator Courtney Johnston

A video game that simulates a visit to an art gallery.

Gallery: Screen shots of Pippin Barr’s ‘The Artist Is Present’ browser-based video game

Marina Abramović: The Artist Is Present - MOMA 2010

Marina Abramović: The Artist Is Present - portraits of visitors
Play Pippin Barr’s ‘The Artist Is Present’ browser-based video game
Pippin Barr explains ‘The Artist Is Present’