Way to derail your own thread. Here's some reality check.
Kutubdia is one of many islands off
Bangladesh and India affected by increasingly rapid erosion and some of the fastest recorded sea-level rises in the world. These "vanishing islands" are shrinking dramatically.
Kutubdia has halved in size in 20 years, to about 100 sq km. Since 1991 six villages on the island of fishermen and salt workers have been swamped and about 40,000 people have fled. Like Hashem, most have relocated to the coast near Cox's Bazar.
At the current rate of erosion Kutubdia will be off the map within 30 years, along with dozens of other coastal islands.
Sandwip, near Chittagong, covered 600 sq km 50 years ago. It is now a tenth of the size, its area having halved over the past 20 years alone. Further north along the Bay of Bengal, 12 islands – home to 70,000 people – are said by the Bangladeshi government to be "immediately threatened" by the rising seas.
https://www.theguardian.com/global-development/2013/jan/29/sea-change-bay-bengal-vanishing-islands