Earlier this month, the International Maritime Organization agreed its net zero framework at the 83rd meeting of its Marine Environment Protection Committee.

If you’re not sure what was agreed or the impact it will have on shipping, make sure you listen to our MEPC post-mortem episode of the podcast, which is available here.

A lot of shipping’s decarbonisation chips have been placed on e-fuels.

This is where an electrolyser is used to split hydrogen from water and combine that so-called green hydrogen with nitrogen to make ammonia, or CO2 to make synthetic methane or methanol.

E-fuels are by far the most expensive option, but they're also seen as the best way to decarbonise the industry in the long term, but not by everyone.

So are we placing far too much stock in e-fuels? Or can they live up to their salvatory status and deliver shipping to net zero in time?

Joining Declan on the podcast this week are:

Michael Liebreich, Bloomber New Energy Finance founder

Dr Tristan Smith, University College London associate professor in energy and transport