Kiribati includes Kiritimati (Christmas Island), the largest coral atoll in the world, and Banaba (Ocean Island), one of the three great phosphate islands in the Pacific. Except on Banaba, very little land is more than three meters above sea level.
The original inhabitants of Kiribati are Gilbertese, a Micronesian people. Approximately 90% of the population of Kiribati lives on the atolls of the Gilbert Islands. Although the Line Islands are about 2,000 miles east of the Gilbert Islands, most inhabitants of the Line Islands are also Gilbertese. Owing to an annual population growth rate of around 2.5% and severe overcrowding in the capital on South Tarawa, a program of migration has been implemented to move nearly 5,000 inhabitants to outlying atolls, mainly in the Line Islands. The Phoenix Islands have never had any permanent population. A British effort to settle Gilbertese there in the 1930s failed due to lack of water. A new program of settlement to the Phoenix Islands was begun in 1995.