Positive Feedback Podcast

Science Podcasts

Positive Feedback is a podcast about climate change, denial, and everything in between. The show is produced and hosted by journalist Graham Readfearn.




Positive Feedback is a podcast about climate change, denial, and everything in between. The show is produced and hosted by journalist Graham Readfearn.






Global emissions hit record high after three-year pause

For three years, the world's emissions of greenhouses gases from fossil fuels and industry had plateaued. But the release of new figures from the Global Carbon Project suggests that pause may be over. The Global Carbon Project's Dr Pep Canadell gives us the numbers and explains why emissions are on the up again. Climate policy expert Professor Frank Jotzo asks what that means for policies around the world. Global Carbon Project http://www.globalcarbonproject.org/ Dr Pep Canadell...


The Anthropocene - a new epoch, all of our own making

What is the anthropocene, and could it be anything other than a really bad news story for us humans that created it? This episode is a recording of a session from the 2017 Brisbane Writers Festival, featuring: *Clair Brown, economics professor at the University of California and author of Buddhist Economics - http://buddhisteconomics.net/about/ *Charles Massy, sheep farmer, academic and landscape manager and author of Call of the Reed Warbler...


How a 1969 snorkel trip led to a shocking discovery about the future for the world's coral reefs.

Marine biologist Professor Ove Hoegh-Guldberg "almost fell off the chair" when he realised how vulnerable the world's coral reefs would be to climate change. But after being attacked as an "alarmist", it turns out he may have been too conservative. Follow host Graham Readfearn https://twitter.com/readfearn


How half a degree in global warming can really matter for heatwaves and extreme heat

In this “red hot” episode, climate scientists Dr Sarah Perkins-Kirkpatrick and Dr Andrew King tells us how a half a degree centigrade of global average warming can have serious impacts on heatwaves and extreme heat.


What's a post-modern climate scientist, and why do they need a loony bin?

Climate science is evolving to the point where it doesn't quite fit into the old understanding of what science actually does. Dr Sophie Lewis has written a book - A Changing Climate for Science - explaining the role of a scientist in a world where they are under increasing attack. And she explains why she has a loony bin.


Jet Streams, extreme weather and marching in the face of climate science denial

Why are scientists watching a cold blob in the North Atlantic, are we making the jet stream wobblier, and why are scientists planning to march on the streets? Climate scientist Professor Stefan Rahmstorf ties all these threads together and reveals why his favourite publication was one he wrote for kids.


Can the world's coral reefs be saved from a bleached white future?

Global warming is killing corals across the planet. So what is coral bleaching and can anything be done to stop it? Professor Terry Hughes talks about his major new research on the Great Barrier Reef just published in Nature. Dr Mark Eakin, of NOAA, explains how bleaching swept the world and how President Donald Trump wants to promote the fossil fuels that are killing reefs.


Clive Hamilton talks Trump, Turnbull, climate denial and the dangers of false hope

Author Clive Hamilton has been engaged in the climate debate for more than 20 years, with books selling worldwide. Always fearless, Hamilton explains his "disgust" at Australia's Prime Minister and the events in the U.S that are galvanising climate science deniers. He reveals the frustrations that led him to quit the Australian Government's Climate Change Authority.


How climate models work, and what's with Antarctica right now?

From massive cracks in ice shelves to record low sea ice, Antarctica is hitting headlines. Dr Nerilie Abram tells us what's going on. Also, climate science "sceptics" want you to think climate models are broken. Professor Steven Sherwood explains what's in a climate model and gives us the nuance that's often lost.


Can you inoculate people from fake climate news, and how fast are we changing the climate?

You've heard that 97 per cent of climate scientists agree that humans are causing global warming? We hear from the author of that study, Dr John Cook, who thinks you can inoculate people from climate myths. And just how fast is the climate changing now compared to the ancient past? Professor Will Steffen has an equation for that.


Episode One: Heatwaves and getting a climate science denier for a President

Welcome to a new podcast about climate change, denial, and everything in between. In this episode, we hear from a climate scientist from Sydney specialising in heatwaves who has just been through a record breaking heatwave - in Sydney. And we go to Oklahoma to hear from a leading environmental sociologist about how America arrived at a point where it could elect a climate science denier as a president.