Recent cyclones in Bangladesh are increasing water salinity and problems for accessing clean water.
Rising sea levels have broken man-made dams affecting people's livelihoods.
According to a study by the World Bank, about 28 million Bangladeshis are living in harsh conditions in the "hard-to-reach areas".
Al Jazeera's Jonah Hull reports from Cox's Bazaar, Bangladesh.
Source: Al Jazeera