Tuvalu has been trying to sue countries and corporations over their imagined doom for decades. This seems to be an attempt to lobby for similar ways to extort money from richer countries.
In case you missed the news, Tuvalu isn't sinking or becoming uninhabitable because somewhere else someone is doing something evil.
Tuvalu isn't the International Space Station. If a population of 10,000 people have to import food and water, then their state has failed and it's time to wake up and start doing some accounting and maybe ask for help to stabilize the situation. Note when I say stabilize, I don't mean the medical definition where a patient can simultaneously be "stable" and also teetering on the edge of death, I mean true stability, like a bar of gold sitting at the bottom of a hill.
No one is doing anything evil. Despite that there are still a lot of problems with how basic needs like food and water are met in Tuvalu and solving those problems is going to be expensive and politically/socially very complicated. My cousin in Aotearoa burned his brother's house down because he didn't want to share gravel from his quarry. You think these men would share food with eachother if everything went off? Or water? There are tons of little blood feuds like that out here that would go off if it suddenly turned out there were no more boats coming.
Until the neocolonial period, there were massive land thefts in the pacific. A lot of the best land for fishing and farming was taken and converted to resorts and suburbs by people who have incorrectly taken the resources of wealthy nations for granted. In order to achieve stability, a lot of people have to move, buildings need to be cleared, ecosystems need to be restored. It all costs money, and it's only going to become more expensive as the situation develops over the next ten years.
I'm glad you see all states as blameless in this situation, because the work required to investigate and assign blame is a huge waste of time and resources. The facts are that there is a massive food and water crisis brewing in the pacific ocean; there are local actions which can help to stabilize communities in anticipation of said crisis; there are also measures that foreign stateses can take to reduce their emissions and such efforts could help avert or mitigate what will most certainly be a very wet and deadly refugee crisis.
You know the GDP per capita in Vanuato and Tuvalu is about $3000, or roughly one tenth of the poorest US state, Mississippi?
Source: https://www.google.com/publicdata/explore?ds=d5bncppjof8f9_&...
People can go and live in a very basic way if they like; that is on them. There are communities that do it here and there. It just doesn't look like the Tuvaluvians have made that choice, and we know the vast majority of people prefer having luxury and comfort. Tuvaluvians are probably a lot like everyone else in the world in that they want to improve their living standard by an order of magnitude rather than keep on living with basically nothing on some island somewhere.
It is easy to romanticise subsistence lifestyles but very few people voluntarily choose them when they see an alternative. The consensus position is wealth and infrastructure is the right choice. It is reasonable to assume they also want this and that their actions are generally aligned to improving their position rather than holding steady.