A coalition of 19 countries has unveiled the first framework agreement to create green shipping corridors between two or more port pairs at the COP26 climate talks.

Members of the Clydebank Declaration for Clean Shipping Corridors defined the corridors as zero-emission maritime routes, and said the group's mission is "a collective aim to support the establishment of at least six green corridors by the middle of this decade".

The longer-term aim is to scale up activity and have more and longer routes in operation by 2030 — plus more ships on those routes.