Bangladesh’s sprawling and impoverished capital Dhaka is becoming increasingly overwhelmed by ‘climate refugees’ fleeing the effects of cyclones and rising sea waters in the countryside, authorities are struggling to find a solution.Duration: 02:30- Intaz Ali, Cyclone Sidr victim (man) (Bangla) - Muhammad Abdur Razzaque, Bangladesh Minister for Food and Disaster Management (man) (English) - Atiq Rahman, UN Inter-government Panel on Climate Change (man) (English)SCRIPT: Intaz Ali and his family are refugees in their own country. But instead of fleeing war or persecution, they are trying to escape what some scientists say are the effects of climate change. They were forced to leave their village in southern Bangladesh after Cyclone Sidr wiped out their home in 2007, and killed thousands of people. SOUNDBITE 1: Intaz Ali, Cyclone Sidr victim (Bangla, 14 secs): "After the cyclone I tried to earn a living but it was very difficult. So finally I had to move to Dhaka to earn money." The UN predicts that within 40 years some 20 million Bangladeshis like Intaz will be displaced because of severe natural disasters caused by changing weather patterns. These so-called 'climate refugees' are already moving to major cities, exacerbating water and power shortages, and causing traffic chaos. SOUNDBITE 2: Muhammad Abdur Razzaque, Minister for Food and Disaster Management, Bangladesh Government(English, 15 secs): "I would say in Dhaka city, 60 per cent of people, they don't have adequate income to maintain a minimum standard of living, that's the problem. So you're sharing the resources." Bangladesh is no stranger to natural disasters, but some experts say climate change is behind the growing frequency and intensity of floods and cyclones. This is footage of Cyclone Aila hitting southern Bangladesh in 2009. More than 370,000 people were left homeless, and scientists say this is just the beginning. They are urging major carbon emitters like America and Australia to step in and house these people. SOUNDBITE 3: Atiq Rahman, Member, UN Inter-government Panel on Climate Change (English, 14 secs): "Poor people of Bangladesh, they are not responsible for the problem, they are the greatest victims. So it is the communities and the countries responsible, and the enterprises responsible, they must take responsibility of managing this displaced population." In the meantime, Bangladesh's government is trying to prepare for the worst. With more than 20 million people expected to live in Dhaka in just 10 years, they have little choice.