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Four changes to trade rules to facilitate climate change action / Aaditya Mattoo &#38; Arvind Subramanian, Vox, 4 May 2013http://www.voxeu.org/article/four-changes-trade-rules-facilitate-climate-change-actionGlobal climate cooperation has collapsed but the need for action has not disappeared. This column argues that only radical technological progress can reconcile climate-change goals with development. It argues that four changes in WTO trade rules could facilitate climate-change action and technological advances without unduly damaging trade...