Kabir+B

=//__How Climate Can Be Influenced By Human Activities__//=




 * Human activities contribute to climate change by causing changes in Earths atmosphere by releasing high amounts of green house gases to it. The 4 mains green house gases elements, which are called Carbon Dioxide (CO2), Methane (CH4), Nitrous Oxide (N2O) and Chlorofluorocarbons or CFCs. Greenhouse gases affect climate by altering incoming solar radiation and outgoing thermal radiation that are apart of Earths energy balance.**


 * Carbon dioxide is a major part of climate change. It is caused by 2 things, combustion of fossil fuels and deforestation. Fossil fuels, such as coal, oil, and gas, form when the remains of ancient organisms are compressed. Gas is a major fossil fuel because it is used in cars, which most people have. Deforestation increases carbon dioxide because plants and trees take in carbon dioxide and replaces it with oxygen, but with less trees/plants there are going to be more carbon dioxide.**
 * [[image:nasa_graph.gif]]As you can see in this graph tracked by NASA It shows how much carbon dioxide was put in our atmosphere and under it shows us the same years and how our temperature has increased dramatically.**


 * Methane is very efficient at absorbing gas. It is 25 times more powerful then carbon dioxide at absorbing and emitting the heat radiating from Earth's surface. It is caused by 4 things, processing of fossil fuels, livestock agriculture, waste dumps and rice paddies. Methane in our atmosphere is not as much as carbon dioxide because their is not as much agriculture as before.**


 * Nitrous oxide is the third largest contributer to to the enhanced greenhouse effect. It is created from the production of chemical fertilizers, burning waste and industrial processes. Natural processes in soils and the oceans also release nitrous oxide into the atmosphere.[[image:co2ch4n2ogasesconcentrations.jpg]]This graph demonstrates how much greenhouse gas has increased over the years.**


 * Chlorofluorocarbons or CFCs is the least known of all 4 of them. It is a human created greenhouse gas, with powerful global warming potential. CFCs is commonly used in Aerosol spray cans ( hair spray, spray paint cans ), air conditioners, refrigerators, and even fire extinguishers were getting into the atmosphere in large quantities, and CFCs will take a fairly long to get out of the atmosphere.**


 * [[image:chloro.jpg width="344" height="328"]]This is a picture of the ozone layer which i made up of ozones. It occurs naturally in the stratosphere. This layer filters out harmful ultraviolet radiation from the sun. But chlorofluorocarbons will cause the ozone layer to break down.[[image:cfc.gif width="714" height="510"]]**


 * BIBLIOGRAPHY- Textbook page 484-486**
 * []**
 * []**
 * []**
 * []**