AAP: A group of Australian scientists is helping to save a tiny central Pacific island nation from a dangerous byproduct of rising sea levels. Kiribati is slowly being swamped by salt water, shrinking the land mass and threatening the islanders’ precious supply of fresh water stored in underground reservoirs. A team of experts from the Australian National University in Canberra has devised a plan to help the small nation of 100,000 secure its water supply against seawater and other …