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Can they really save the planet? Political leaders have returned to Paris and they want a binding deal to curb carbon emissions and come up with enough money to make the switch to renewable energies. But will it be enough to stop the planet from overheating? According to Bjorn Lomborg, the president of the Copenhagen Consensus Center, it is not ideal to focus on the Paris Conference deal, but on the next ones, because the final agreement will have 'a small impact at a very high cost'.

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