Aleksishvili said it was estimated that investments of up to $550 billion a year through 2030 would be needed to improve access to reliable and affordable modern energy services.
South African UN Representative Dumisani S. Kumalo, speaking for the Group of 77 developing countries and China, said far more must be done to meet internationally-agreed development goals.
The collective political will to address the three pillars of sustainable development had been declared, but that had not been converted into action.
Close to 80 ministers as well as representatives from 1,250 major organizations will be attending the meeting.