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As the world gathers in Paris to hammer out measures which all hope will slow the rise in global temperatures, In the Balance is in the city to debate the role of big business and big finance in what happens now? We hear from the CEO of one of the world's biggest electricity producers - Engie - and from the former President of Mexico Felipe Calder贸n. They are joined by an audience of activists, students and some leading thinkers from the world climate economics, to debate what corporate responsibility might look like, as the world confronts the need to change its ways. That's the Climate Countdown - an In the Balance special debate - from the Climate summit in Paris. PHOTO: Shows an apple marked with the portrait of French President Francois Hollande and another apple marked with the logo of the COP21 (CREDIT: Jean-Christophe Verhaegen/AFP/Getty Images)