I'm happy to do so.
The International Maritime Organization has been working for a number of years now to identify potential pathways for the international shipping sector to reduce its emissions. It's one of the highest emitters in the transportation sector, and very challenging to decarbonize.
One of the options being discussed at the IMO is a carbon levy, along with the concept of a low-carbon fuel standard. These are live discussions that are happening, and Canada is participating in them.