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Anthony Warner is author of Ending Hunger: The quest to feed the world without destroying it.

Cassandra Coburn is the author of Enough: How your food choices will save the planet.

New Generation Thinker Alasdair Cochrane from the University of Sheffield is the author of Should Animals Have Political Rights?

They join Anne McElvoy for a conversation about food and sustainability. Plus novelist Richard Flanagan's latest book called The Living Sea of Waking Dreams recalls the devasting fires in Australia and Tasmania and against this dying world depicts a dying woman and her three children in a magical realist fable.

In 2014 he won the Man Booker Prize for The Narrow Road to the Deep North, which considered the experiences of a Far East prisoner of war during the construction of the Burma Railway.

You can find more conversations in a playlist on the Free Thinking website called Green Thinking which includes a discussion of Rachel Carson's Silent Spring, a consideration of the soil, dams and deserts /programmes/p07zg0r2

Producer: Emma Wallace