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1. 

   10-21-10

   guest says:

   Global change refers to planetary-scale changes in the Earth system. The system consists of the land, oceans, atmosphere, poles, life, the planet’s natural cycles and deep Earth processes. These constituent parts of the Earth system influence one another (Wikipedia, 2010).
   Climate change is a long-term change in the statistical distribution of weather patterns over periods of time that range from decades to millions of years. It may be a change in the average weather conditions or a change in the distribution of weather events with respect to an average, for example, greater or fewer extreme weather events. Climate change may be limited to a specific region, or may occur across the whole Earth (Wikipedia, 2010).
   Global warming is a progressive increase in the mean atmospheric temperature of the Earth that has been hypothesized by a number of international scientists to result from the increasing release of “greenhouse gases”, as related to certain manufacturing, energy utilization, and biological metabolism processes.

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