Hopenhagen was launched by UN secretary general Ban Ki-moon at the Cannes advertising festival in June after the UN had approached the IAA last year to create a campaign in advance of the UN Climate Change Conference in Copenhagen. Ogilvy New York took on the task following an eight agency competitive pitch in February. CR spoke to Ogilvy worldwide creative director Tham Khai Meng about its idea to "create a people's movement through social media to drive change".
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