Could an alternative air fuel mitigate soaring oil prices and keep flying affordable?

The impasse in the Iran war and its spillover effect on the Middle East has sparked uncertainty in global oil supply and caused airlines to raise fuel surcharges in anticipation of rising costs. Sustainable aviation fuel, an alternative to conventional jet fuel, is already in use in some parts of the world. What is it and is it a good enough substitute to buffer us from the impact of fluctuation in oil supply and prices? CNA's Lu Jiaxin and Jeraldine Yap report from Hong Kong.