The Carteret Islands are almost invisible on a map of the South Pacific, but the horseshoe scattering of atolls is on the front-line of climate change, as rising sea levels and storm surges eat away at their existence. For 20 years, the 2,000 islanders have fought a losing battle against the ocean, building sea walls and trying to plant mangroves.

Each year, the waves surge in, destroying vegetable gardens, washing away homes and poisoning freshwater supplies. Papua New Guinea's Carteret islanders are destined to become some of the world's first climate change refugees. Their islands are becoming uninhabitable, and may disappear below the waves.

A decision has been made to move the islanders to the larger nearby Bougainville island, four hours' boat ride to the southwest. Ten families at a time will be moved, over one to two years, once funds are allocated for the resettlement program.

A United Nations panel of more than 2,000 scientists has predicted that average sea levels are likely to rise between 9 and 88 cm (3.5 to 35 inches) by 2100, mainly because of a build-up of heat-trapping greenhouse gases in the atmosphere from the burning of fossil fuels, such as oil and coal. . . At the higher end of the forecast, the sea would overflow the heavily populated coasts of countries such as Bangladesh, and cause low-lying island states like the Indian Ocean's Maldives and South Pacific's Kiribati and Tuvalu to disappear.