I assume their situation is made difficult by a huge population on tropical, (mountainous?) islands. Do they have reasonable locations for landfill?

Could other countries apply tariff-based pressure based on plastics detection at river mouths, and help with any methods of addressing the problem? There was a comment the other day that plastics in food/bev wrappers was one issue. Surely these are not unsolvable problems with a bit more motivation?

Also wouldn't hurt to publicise the info about ocean plastics coming from their islands (like your comment) and hopefully that encourages change also.