Global Warming
... Global warming is a theory that has been associated with a rise in the global average temperature. Scientists argue whether global warming is a serious issue or just a waste of time. ... Global warming is defined as “a perceived increase in global temperature as a result of the release of greenhouse gases produced by human activities. ... They were concerned that it may result in an excessive cooling, not warming. The predictions based on computer models indicated that a decrease in CO2 levels would cause the average global temperature to decrease also. ... Scientists argue over the global warming theory. Some claim that it should be treated as a serious environmental threat and that global action should be taken. ... Those who argue about global warming occurring have another dispute over the causes of it. Human activities may be the main cause behind it while others say that the current global heat is just another part of a natural cycle. ... (Parsons 5) There are many causes behind global warming. Countless years of research have been devoted to pinpointing the specific reasons that global warming has become an issue. ... Global warming is also in part caused by human activity. ... Carbon dioxide, as scientists claim, is the greenhouse gas that is the main factor causing global warming. ... So the warming trend is said to be according to nature’s plans. ... Starting in 1950 and ending in 1980 global temperature models showed a decrease in the average temperature suggesting another Little Ice Age. ... (Parsons 45) Natural causes such as the moon’s gravitational pull, ocean currents, the sun’s radiation, the ozone, and El Nino/La Nina are thought to be an explanation for global warming. ... Researches say that El Nino and La Nina are necessary to understand as well as their water forms and interactions with earth’s radiation, oceans, water vapor, ice, and snow so that they could get a better idea of its relationship with global warming.