Global Warming refers to the gradual increase in the Earth’s temperature as a result of the growing concentration of human induced green house gases (CO2-carbon dioxide, CFCs-Chlorofluorocarbons, HFCs-hydrofluorocarbon) in our atmosphere.
Human activities — primarily, the burning of fossil fuels, coal and car emissions, have resulted in growing concentrations of carbon dioxide and other greenhouse gases in the atmosphere. These increasing quantities of greenhouse gases are retaining more and more of the sun’s heat. The heat trapped by the carbon dioxide blanket is raising temperatures all over the world — hence, global warming.
So far, Earth has seen a 1.4-degree Fahrenheit (0.8-degree Celsius) increase in global average temperature because of increased greenhouse gases in the atmosphere. Unfortunately, the amount of greenhouse gases that human activities produce grows daily. So, humanity’s current behavior is driving temperatures up at an alarming rate. Temperatures in polar regions, such as the Arctic, are experiencing temperature rises that are twice the global average.