Global warming is a major concern for modern day society. As global temperatures rise, the glacial caps melt and species of plants and animals adapted to a specific climate are put at risk of extinction. A major contributing factor to this global warming is a process called the greenhouse effect. As human activity increases, so does the global CO2 levels. CO2 is a heavy gas, meaning that it will pass visible light, while reflecting infrared light. This causes the CO2 in the atmosphere to build and retain heat. The rapid increase in CO2 levels is one of the major causes of the increase in the global temperature.
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