The global shipping industry is one of the most polluting in the world, with the International Maritime Organisation reporting that the industry emits around 940 million tonnes of CO2 annually, making it responsible for around 2.5% of global greenhouse gas emissions. (Sourced from the 3rd IMO GHG study.)
These statistics have been discussed time and time again by government officials, with talks on how they can be reduced, either by the implementation of regulations or by guidelines when it...
https://www.ship-technology.com/features/uk-drive-for-zero-emission-ships-the-future-or-a-fantasy/