Up to 20 million people in low-lying Bangladesh are at risk from rising sea-levels, according to new research.
So the country needs inventive solutions to help minimise the impact of flooding in the future.
Britain's Department for International Development is sponsoring farmers to cultivate crabs not crops, ducks not chickens, and gardens that float.
The BBC's David Shukman has been to see how some of the solutions may help those who are in areas vulnerable to flooding.
Video of the projects courtesy of Department for International Development (DfID)
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