Tuvalu is one of several Pacific island nations closely watching predictions about rising ocean levels. It's 700 miles north of Fiji. Residents there say the months of highest tides are already worse and wetter than historically. Homes and precious farm land have been lost. Well water is becoming salty. The CIA summary on Tuvalu states it succinctly. "Tuvalu is concerned about global increases in greenhouse gas emissions and their effect on rising sea levels, which threaten the country's underground water table."