Essay on Global Warming
Eye Opening Facts that it is Refutably upon Us
Terrie M. Hornbeck
Buena Vista University
Prepared for: Laura Brahn’s Globalism Seminar
In recent years, scientists noticed that the average temperature of the Earth was increasing and looked for causes for the change. It is clear that the Earth has had changes in its average temperature many times in the geologic past before humans were present (Enger & Smith, 2013). Therefore, scientists initially tried to determine if the warming was a natural phenomenon or the result of human activity. Several gases such as carbon dioxide, chlorofluorocarbons, methane, and nitrous oxide are known as greenhouse gases because they let sunlight enter the …show more content…
Several gases in the atmosphere are transparent to ultraviolet and visible light but absorb infrared radiation. These gases allow sunlight to penetrate the ozone and absorbed by the Earth’s surface. This sunlight energy reradiates as infrared radiation (heat), which absorbs by the greenhouse gases in the ozone. Because the effect is similar to what happens in a greenhouse (the glass allows light to enter by retards the loss of heat), these gases are called greenhouse gases, and the warming from their increase is called the greenhouse effect (Enger & Smith, 2013). The most important greenhouse gases are carbon dioxide, methane, chlorofluorocarbons, and nitrous oxide. Carbon is the worse contributor with a 64 percent rate for global warming (Enger & Smith, 2013).
Carbon dioxide is the most abundant of the greenhouse gases. It occurs as a natural consequence of respiration. However, much larger quantities are put into the atmosphere as a waste product of energy production. The three major industries that contribute to carbon emissions are power plants at 33 percent, transportation at 28 percent and industry at 20 percent