The Emirati host of the U.N. climate conference in Dubai denied Wednesday reports that he used his presidency of the crucial talks on global warming to pursue fossil fuel deals.

The allegations against Sultan Al Jaber, who is also CEO of his country's oil giant ADNOC, have fanned long-running suspicions over the wisdom of a petrostate hosting the COP28 talks.

But Jaber, who also chairs a UAE-owned clean energy company, strongly denied reports that he used his position as COP president to pitch new oil and gas investments to governments.