FocusOpec Secretary General: Halting new oil and gas investment could 'leave long-term scars'“We need to ensure that energy's affordable for all,” said Opec Secretary General BarkindoVirtual address: Opec Secretary General Mohammad Sanusi Barkindo speaks at the 23rd WPCPhoto: NICK AGRO/ CORPORATEEVENTIMAGES/ UPSTREAMNishant UgalHouston