Out planet is in a delicate balance that is in danger of tipping over.

A new documentary, narrated by David Attenborough called 'Breaking Boundaries: The Science of Our Planet' looks at the work of climate scientist Johan Rockström, who is trying to understand the various earth-systems that keep us in the 'goldilocks' zone - from C02, to fresh water, and nutrients.

Johan Rockström, Professor in Earth System Science at the University of Potsdam, Director of The Potsdam Institute for Climate Impact Research joined Jonathan to discuss.

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