OPINION: US President Joe Biden has taken a battering from many commentators since he fist-bumped Mohammed bin Salman in Riyadh.

It was perhaps the most poignant and ultimately embarrassing symbol of the way the crisis around energy has forced a rethink on geopolitics and a certain amount of back-pedalling.

Biden, who promised to lead his country into a new world of decarbonised power systems, was forced into a Middle East policy U-turn in his bid to increase oil supplies and bring down prices.