Koch Industries, which is owned and run by two Kansas-based brothers and has substantial oil and chemicals interests, spent the sum between 2005 and 2008 to finance "organisations of the 'climate denial machine'", claims the environmental campaign group Greenpeace.
Despite the relatively small size of the conglomerate, the sum is three times that spent by ExxonMobil, the western world's biggest oil company, in the same period. A Greenpeace investigation also claimed that between 2006 and 2009, the company and its owners - Charles and David Koch - spent £25.3 million ($37.9 million) on direct lobbying on oil and energy issues.
Oil conglomerate 'secretly funds climate change deniers'
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