From Barbados to Bangladesh, here is a look at nations that have been most affected by climate change.
Papua New Guinea Residents of Kilu village on the island of New Britain, Papua New Guinea, people have had to move homes back from flooded beaches. As seas rise with global warming, island states and low-lying costal communities elsewhere report ever-higher tides encroaching on their shorelines. Scientists project that seas will rise two feet or more in this century if greenhouse gases pollute the atmosphere unabated. David Longstreath/AP Buy Photo