Reports of a letter from the OPEC club of oil producing countries sparked outrage among many at the United Nations climate conference in Dubai on Saturday. The letter, signed by OPEC Secretary General Haitham al-Ghais, reportedly calls for OPEC members to block ambitious resolutions on phasing out fossil fuels like coal, oil and gas at the conference. The leaked letter was reported by The Guardian newspaper and other news outlets, but dpa could not independently verify its authenticity. OPEC officials did not immediately respond to a request for comment. “It seems that the undue and disproport…