2020: The Climate Turning Point

Kathryn Ryan talks to Christiana Figueres - the former UN climate chief and a key architect of the 2015 Paris Agreement. Ms Figueres and a team of top climate scientists recently published a report outlining six critical milestones that they say must be met within the next three years. If they're not met, they say there will not be enough time to decarbonise the economy before overshooting tipping points, which could lead to permanent changes in the global climate.