"The question of negotiations with the United States is not serious. So long as the United States does not renounce its attitude and oppressive and satanic vision, the problems will not be solved." Government spokesman Gholam Hossein Elham said, according to the Mehr news agency. Iran on Tuesday said the idea of holding negotiations with the United States was "not serious" in the current climate, amid expectations of bilateral talks between the two foes at a conference on Iraq this week. Reaching peak oil production is unlikely during the next 25 years, but "the public has a different opinion and we as an industry must respond." Rick Vierbuchen, vice president of Caspian/Middle East ExxonMobil a said Monday at the Offshore Technology Conference. The speech came just a few hours after a sold-out luncheon that featured the most prominent global advocate of the peak oil theory, Matthew Simmons. Simmons is the chairman of Simmons & Co., and at his speech reviewed his argument that world crude production has reached its peak. Updated: May 1, 2007