"Some regions are likely to be especially affected by climate change. The Arctic, because of the impacts of high rates of projected warming on natural systems and human communities; Africa, because of low adaptive capacity and projected climate change impacts, Small islands, where there is high exposure of population and infrastructure to projected climate change impacts Asian and African megadeltas, due to large populations and high exposure to sea level rise, storm surges, and river flooding. The IPCC Fourth Assessment Report concludes that non-climate stresses can increase vulnerability to climate change by reducing resilience and can also reduce adaptive capacity because of resource deployment towards competing needs. Vulnerable regions face multiple stresses that affect their exposure and sensitivity to various impacts as well as their capacity to adapt. These stresses arise from, for example, current climate hazards, poverty, and unequal access to resources, food insecurity, trends in economic globalization, conflict, and incidence of diseases such as HIV/AIDS."