Bangladesh launched the world's largest "climate refugee" project in Cox's Bazar, a city in the south-east of the country.
The project will house a growing number of people forced to flee their homes because of climate change and a failing economy.
Bangladesh is one of the worst affected countries of global warming despite having one of the lowest carbon footprints.
According to the Environmental Justice Foundation, one in every seven people in Bangladesh will be displaced by climate change by 2050. Up to 18 million people may have to move because of rising sea levels alone.