Before the end of the century, millions of Bangladeshi will be forced to leave their land because of climate change and its consequences. In the south west where populations are already affected by sea level rise and salinisation, the pressure becomes so strong that people who can afford it already move to Dacca. As it is also the case in many other areas of the country the capital is  growing very fastly. But Dacca, while being more and more exposed to intense flooding, will not be able to expand endlessy. The question is then : where will the banglasehis migrants go ?