The chief executive of Saudi Aramco, the world’s largest oil producer, has called on global leaders to continue investing in fossil fuels in the years ahead or run the risk of spiralling inflation and social unrest that would force them to jettison emissions targets.

Speaking at the World Petroleum Congress in Houston, Texas, Amin Nasser said there was an assumption that the world could transition to cleaner fuels “virtually overnight”, but that this was “deeply flawed”.

“I understand that publicly admitting that oil and gas will play an essential and significant role during the transition and beyond will be hard for some,” Nasser told delegates at the WPC, one of the biggest gatherings of oil and gas executives in the world.

“But admitting this reality will be far easier than dealing with energy insecurity, rampant inflation and social unrest as the prices become intolerably high and seeing net zero commitments by countries start to unravel.”

Nasser’s comments come amid growing investor and social pressure for fossil fuel companies to make their operations greener. The International Energy Agency said earlier this year that energy groups must stop all new oil and gas exploration projects if the world is to achieve net-zero emissions by 2050.

“The world is facing an ever more chaotic energy transition centered on highly unrealistic scenarios and assumptions about the future of energy,” Nasser said.

Higher fuel prices — which have risen sharply as global economies bounce back from the Covid-19 pandemic — have left governments scrambling as they try to balance pledges to decarbonize with efforts to keep down costs at the petrol pump.

In the US, President Joe Biden, who has vowed to lead a transition away from oil, last month announced the country would unleash 50m barrels of crude from its Strategic Petroleum Reserve as part of a push to bring down prices at the pump.

The oil and gas industry has seized on the rise in prices to stress the dangers to energy security and affordability of transitioning too rapidly from traditional fuel sources, and the risks of under-investment in fossil fuels was a common theme at the Houston event.