AFP: The president of Kiribati has said the low-lying Pacific nation must begin planning to relocate its population in case global warming causes sea levels to rise and swamp the country. Kiribati President Anote Tong will present his case at a climate change conference on the main island Tarawa this week attended by vulnerable countries in the region and major powers including China, the United States and Japan. Tong said Kiribati, a former British colony with a population of about 100,000, must…