Global bunker C fuel use is dealt with here. https://www.sciencedirect.com/topics/earth-and-planetary-sciences/bunker-fuel https://www.sciencedirect.com/topics/

Global bunker C fuel use is dealt with here. https://www.sciencedirect.com/topics/earth-and-planetary-sciences/bunker-fuel https://www.sciencedirect.com/topics/earth-and-planetary-sci... It is a large factor due to high sulfur 27,000 ppm