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What is Global Warming? Since the beginning of time there have been documented variations in climate and temperature. A well known climate variability that Californians experience, El Nino, occurs every three to six years and results in warmer ocean temperature, increased ocean upwelling, and drier winters. While this phenomenon appears to be threatening to our environment, it is simply just a natural climate cycle. However there is a hazardous threat to our Earth that has been occurring for the past hundred years. The phenomenon known as global warming refers to the average increase in the Earth’s overall temperature. Such an increase in temperature can result in drastic climate changes that in tern can lead to a rise in sea level, changes in rainfall, and detrimental impacts on plant and wildlife. In order to truly understand the phenomenon that is global warming one must analyze and understand the greenhouse effect, greenhouse gases, and climate change. The Earth’s atmosphere plays a key role in the global warming process. As the sun’s energy p