The IPCC Fourth Assessment Report shows strong confidence that the world is warming. Small island countries, developing countries and least developed countries remain the most vulnerable to the impacts of climate change. For countries like Marshall Island, with atoll islands located just a few meters above sea level, any uncontrolled rise in sea level has the potential to submerge land areas. Additionally, climate change impacts could include increased tropical cyclone activity and coastal erosion. Coral bleaching and ocean acidification due to warming also have the potential to affect tourism, fishing and agriculture, as well as the ability of corals to regenerate. Sovereignty claims over natural resources and territory may increase as maritime zones shrink due to the ambulatory nature of baselines. The issue of climate change refugees and resettlement also poses challenges. Competition for scarce marine and natural resources could intensify, leaving countries like the RMI in dire straits. The loss of maritime zones, national, regional and international security, population migration and resettlement are issues closely linked to the impacts of climate change. Ambulatory Nature of Baselines/Sea Zone Loss Although not stated in UNCLOS, scholars such as Rayfuse, Caron, and Soon have concluded that baselines are ambulatory. Therefore, when the baselines move, the external boundaries of the maritime zones (territorial sea, contiguous zone and exclusive economic zone) also move. Applying this theory, all the coasts and vice versa the maritime areas of the states affected by the rise in sea levels would move. This change would be most acute for low-lying states facing flooding. Complete submergence of base points from which Marshall Island...... half of document... Climate Hazards and Atoll Countries, p. 325 (2003), http://www.uea.ac.uk/env/people/adgerwn/ClimChange2003Barnett.pdf. They note that without coral bleaching, coral reefs would perhaps be able to grow rapidly with rising sea levels, but are not expected to be able to sustain themselves with the combined impact of projected sea level rise, of the expected increases in bleaching episodes and with additional stress factors, such as the increase in terrestrial pollution sources and the increase in the atmospheric concentration of CO2. These rights are limited in some areas and clearly defined. ACP Fisheries II, Description of the Marshall Islands Fisheries Sector, http://acpfish2-eu. org/index.php?page=marshall-islands&hl=en.Id. Data suggests that the total tuna catch in 2007 was approximately 68,000 tonnes. Pacific Island Forum Fisheries Agency, http://www.ffa.int/node/567. See also Anouk