The Maldivian dhoni is the workhorse of the country's economy. It supplies resorts, links atolls, carries the freight that keeps the islands running. It is also a vessel from another era, built around assumptions about fuel, weight, and the sea that no longer hold.
Every working day, hundreds of them burn marine diesel doing work that today could be done with a fraction of it. The fuel bill is paid by the operators that charter them. Increasingly, by the resorts and communities that depend on them. The emissions are paid by everyone else.
The technology has barely changed in fifty years. The economics around it are changing fast.