The United Nations climate chief on Friday challenged executives of multinational corporations including Coca-Cola and Unilever to play a more serious role in the global fight against climate change. Yvo de Boer told a meeting of corporate CEOs that the international climate change discussion was currently carried out between governments, with little involvement from the business world. 'Basically you are not playing any role in a serious way,' de Boer said. 'This is an intergovernmental process and many would like to keep it that way.' He said the challenge for corporate leaders was to 'make yourself relevant' to what happens at the U.N. climate conference, where negotiators from 192 countries are hammering out the details of a global warming pact. 'I think you are doing a great job at national level but you are not making any connections at the international level,' de Boer said. The chief executives at the Copenhagen Business Day meeting in downtown Copenhagen included Coca-Cola's Muhtar Kent, Paul Polman of Unilever and Gerard Mestrallet of Alstom Power. Many of the participants said they realized that they must change the way they do business as the world moves toward a low-carbon economy. 'Markets and consumers ask you to come with new solutions,' said Bruno Lafont, chief executive of Lafarge SA, the world's largest cement maker. 'Time is now,' said Ditlev Engel, CEO of wind turbine maker Vestas. 'It's now we have to change our businesses to become sustainable. The only question is at what speed we can do it.' In a panel discussion, Malini Mehra, head of the Center for Social Markets, which specializes in corporate responsibility, sustainability and climate change, urged the 21 executives to 'get out there to your governments and shout. And get the NGOs on your side,' she said. Mehra noted that the developing world was not present at the business conference. 'Not one single Indian CEO is here, and do you know why? Because they do not consider Copenhagen to be the most important event in 100 years,' she said. 'Go across and make friends with CEOs in developing countries.' 