ABSTRACT
A significant variation in weather conditions, which is a part of climate change, has been observed on Earth. Although changes occur in climate due to natural phenomena (such as volcanoes, tectonic plates, variation in sun’s energy, etc.), there are many domestic and commercial activities of human beings which are quite responsible for the increase in rate of climate change problems. The effect of climate change, which is referred to as global warming, can be observed as increase of earth’s temperature year by year. Apart from increase in earth’s temperature, natural disasters and extreme weather events are also being seen in many parts of the world. According to the Intergovernmental Panel on Climate Change (IPCC), greenhouse gas (GHG) emissions produced by human activities are quite responsible for global warming. The average surface temperature of earth increased from 0.6°C to 0.9°C per decade during 1906-2005. As a matter of fact, an increasd of 1°C temperature in earth is quite significant because rise in 1°C temperature has ample heat to warm the glaciers, oceans, lands, and atmosphere (www.earthobservatory.nasa.gov).
