ExxonMobil believes the Union of Concerned Scientists' paper is deeply offensive and wrong. ExxonMobil engages in public policy discussions by encouraging serious inquiry, analysis, the sharing of information and transparency... what is clear today is that greenhouse gas emissions are one of the factors that contribute to climate change, and that the use of fossil fuels is a major source of these emissions. With regard to contributions that ExxonMobil provides to various public policy organizations, our support is transparent and appears on our web site. The support extends to a fairly broad array of organizations that research significant domestic and foreign policy issues and promote discussion on issues of direct relevance to the company.