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Sustaining the world and sustaining ourselves - is it possible to achieve both? It's a big question. Perhaps the most important question of our times - presenter Roisin McAuley discusses with environmentalist Mary Colwell, Professor Cathie Martin from the University of East Anglia, Dr Simon James, environmental philosopher from Durham University, and, adding an extra spiritual dimension, the Reverend Cheryl Meban.

From the scene of the Tomb - Father Eamon Kelly on Easter in Jerusalem.

And the man who came home to Ireland to write a novel - and became a farmer who loves cows.