Ian McIntosh joins the show to talk about the role of CO2 in achieving a greener world.

For over 44 years Ian McIntosh has been involved in the conversion of CO2, water and sunshine into healthy protein for human consumption.

Ian is passionate about sharing easy-to-understand evidence so that Kiwis can make up their own minds on the topic of anthropogenic (man-made) climate change.

Download Ian's slideshow here in PDF.