Climate change affects disaster risks in two ways, first, increase in weather and climate hazards and second, through increase in the vulnerability of communities to natural hazards, particularly through ecosystem degradation, reductions in water and food availability, and changes to livelihoods. In 1992, the United Nations Framework Convention on Climate Change was established to try and stabilise greenhouse gas concentrations sufficiently to prevent dangerous anthropogenic interference with the climate system. Most impacts of climate change are existing threats and many events may be threshold events. The process of climate change and the natural disasters leads the scale and complexity of human mobility and displacement. United Nations Educational, Social and Cultural Organisation are closely involved in raising public awareness and improving education about the natural disasters, helping vulnerable populations to cope with risk. About 94 per cent of natural disasters result from four major causes-earth quakes, storms, floods and droughts.