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While acknowledging their diversity, the IPCC Third Assessment Report (TAR) also noted that small island states share many similarities (e.g., physical size, proneness to natural disasters and climate extremes, extreme openness of their economies, low adaptive capacity) that enhance their vulnerability and reduce their resilience to climate variability and change.

During the course of this century the resilience of many ecosystems (their ability to adapt naturally) is likely to be exceeded by an unprecedented combination of change in climate, associated disturbances (e.g., flooding, drought, wildfire, insects, ocean acidification) and in other global change drivers (especially land-use change, pollution and over-exploitation of resources), If greenhouse gas emissions and other changes continue at or above current rates (high confidence).

Since the IPCC Third Assessment Report (TAR), understanding of the implications of climate change for coa systems and low-lying areas (henceforth referred to as 'coasts’ has increased substantially and six important policy-relevant messages have emerged.

The Working Group I contribution to the IPCC Fourth Assessment Report describes progress in understanding of the human and natural drivers of climate change,1 observed climate change, climate processes and attribution, and estimates of projected future climate change. It builds upon past IPCC assessments and incorporates new findings from the past six years of research. Scientific progress since the Third Assessment Report (TAR) is based upon large amounts of new and more comprehensive data, more sophisticated analyses of data, improvements in understanding of processes and their simulation in models and more extensive exploration of uncertainty ranges.

The Environment can be considered tropical marine. Atolls are especially vulnerable to environmental damage. The water supply is easily damaged by pollutants. Land biodiversity is low. The primary dangers to the environment are tropical storms, oil spills and waste disposal from the settlements. Direct hits by cyclones are not common though near passages have caused serious damage due to high waves.

Samoa is party to a number of international and regional treaties and conventions, including several with energy implications, particularly the United Nations Framework Convention on Climate Change (UNFCCC) and the Kyoto Protocol. Environmental issues related to energy use include air pollution from incineration of rubbish and cooking in outside kitchens. About 70% of Samoa's population and infrastructure are located in the environmentally vulnerable coastal zone. Only four of the coastline is resilient to coastal hazards.

The Republic of the Marshall Islands consists of two groups of atolls and islands: Ralik in the west and Ratak to the east, within a rectangle extending 1150 km north-south and 1300 km east- west. about 3200 kilometers from Honolulu and Tokyo. Twenty-two of 29 atolls, and four of the five small raised coral islands are inhabited. The islands are typically several km long and rarely over 200 meters in width.

Environment The climate is maritime tropical with a small temperature difference between day and night and modest seasonal changes. Rainfall is about 2000 111111 with two-thirds falling between November and April, strongly affected by the El Nino-Southern Oscillation, which can cause rainfall declines of up to 60% in the southern group and increases of 200% or more 111 the north during El Nino conditions. On average, three cyclones occur every two years, usually between November and April. Biodiversity is not high anywhere in the country but the northern atolls are very low in land- based biodiversity. The Government of the Cook Islands (GoCI) has signed various treaties and conventions related to environmental protection, including the United Nations Framework Convention on Climate Change (UNFCC) and the Kyoto Protocol, with energy use implications.

Environmental issues have a high priority. The people of Nine have taken positive action to maintain the environment for future generations. The low population density has allowed large areas of the island's interior to remain as natural forests and this natural state has become a tourist attraction along with the exotic coral formations, caves and other natural attractions of the island. In general water quality and air quality are very good. Periods of drought occur that can cause loss of crops and hardship for residents.

The climate is equatorial marine in nature. There are 110 cyclones though rainfall is cyclic and periodic droughts are a serious problem with one year having a recorded rainfall of only 280 nun. The land biodiversity is limited with only 60 species of indigenous vascular plants. The century of interior mining has resulted in the drainage of large quantities of silt and soil onto the reef. That has greatly reduced the productivity and diversity of reef life from an earlier era. Sewage is dumped into the ocean just beyond the reef causing further environmental problems and many septic tanks place ground water at risk of contamination.