China and India's emissions, page-204

Global flights make up about 2% of emissions according to the ATAG. About 3.5% according to Wiki.

Nothing to sneeze at but still quite small compared to other industries.

https://en.wikipedia.org/wiki/Environmental_impact_of_aviation

Hydrogen powered ships and combination LNG/hydrogen ships are coming. Another industry that will benefit from countries like Australia if we can get the renewable hydrogen industry going.