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Climate change raises a number of drastic environmental changes, such as soil erosion, water shortages, water contamination and deforestation, which leads people to leave their homes and seek livelihood in other places within or outside their own country. Perhaps the most obvious reason why people are forced to flee for environmental reasons is the rising sea levels and subsequent flooding. The IPCC has estimated that sea levels will rise between 28 and 43 centimeters in the next 100 years. It has also estimated that regional variations in the increase of sea levels mean that some small island states are particularly hard hit in terms of loss of land area. Adapted from the source document.