The term climate change is used to denote any significant but extended change in the measures of climate. The changes could be due to natural variability or as a result of human activities, such as the burning of fossil fuels to produce energy, deforestation, industrial processes, and some agricultural practices. Such activities release large amounts of carbon dioxide and other greenhouse gases into the atmosphere that hang like a blanket around the earth, thus trapping energy in the atmosphere and causing it to warm up. This results increasingly in climate variability, which is characterised by extreme seasonal, annual, temporal and non-spatial variability in temperature, vagaries of precipitation (rainfall patterns and amounts) and/or wind patterns occurring over a prolonged period of time. The last decade (2001 - 2010) has been the warmest on record; with the average temperatures reaching 0.46?C, above the 1961 - 1990 mean, and 0.21?C warmer than the 1991 - 2000 period. It has been...