Tim Ball and John O'Sullivan had a close working relationship, even before Mann sued Ball for libel in March 2011. For example, they co-authored the climate science denial book Slaying the Sky Dragon: Death of the Greenhouse Gas Theory.
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Since 1997, Koch Industries and its PACs have given nearly $50 million to climate change-denying groups like Americans for Prosperity, known for its role in organizing the tea party movement.
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