The Cloud Brightening project is trying to buy time for the Great Barrier Reef, hopeful that carbon emissions will be slashed in the future. By spraying microscopic sea particles above the reef, oceanographer Daniel Harrison and his team aim to thicken the clouds to provide shade for the endangered ecosystem.  

Daniel Harrison is recorded live in conversation with Craig Reucassel at Powerhouse Ultimo. For more information go to 100climateconversations.com/daniel-harrison