Global warming is the increase in the Earth's temperature. The main cause of global warming is the greenhouse effect. The way humans behave is why greenhouse gases trap more heat. Automobiles are the leading cause of heat-trapping greenhouse gases. Global warming does not entirely mean a constant increase in temperature, it is mainly a change in temperature. The two main greenhouse gases are methane and carbon dioxide. Carbon dioxide and methane normally come from the Earth's atmosphere. Greenhouse gases are increased due to our human activity. Greenhouse gases are known as synthetic chemicals. Our Earth has experienced at least five ice ages. The very first ice age we experienced occurred almost 2 billion years ago. Additionally, our most recent ice age began almost 3 million years ago. The most recent ice age is still occurring today, so technically we are living in an ice age. An ice age is a long period of time when the planet is semi-cold and the earth is covered in giant sheets of ice in some areas. During an ice age, we experience short periods of very warm weather. Sometimes during hot flashes, glaciers can melt. The medieval warming period occurred between approximately 950 and 1250. The Medieval Warming Period was a period when temperatures increased in the North Atlantic region. The medieval warming period took place in the European Middle Ages. Recently, after the medieval warming period, there has been a colder period called the Little Ice Age. The Little Ice Age lasted from 1250 to the end of the 19th century. Neither the Little Ice Age nor the Medieval Warming Period was found to be global, with both occurring only in the North Atlantic region. Carbon and self...... middle of paper ...... gas to take away in a powerful effect. Greenhouse gases trap all the heat in our atmosphere and make it hotter. Humans have allowed ultraviolet rays to penetrate the ozone layer. The destruction of ozone will make the Earth much warmer. The temperature increases at very rapid rates. Over the past hundred years, our Earth's temperature has increased by a considerable degree. The temperature is rising because of what we humans do to the environment. Besides the greenhouse effect, one of the most harmful elements of global warming is ultraviolet radiation. I agree that global warming is a moral problem because it is our fault. We must work together to prevent global warming. We need to find better transportation and better ways to not increase the greenhouse effect. Works Cited www.FWL.com www.GFDL.com www.climate.org ocean.nationalgeographic.com science.opposingviews.com