words per minute
10
ShivAggarwal
00:00
Speed
The main cause of the increasing global warming is human being however some natural causes also contribute to the global warming. The main culprit of global warming is the increase in greenhouse gases in the atmosphere of this planet. Burning fossil fuels and deforestation causes carbon dioxide to store in the atmosphere which traps heat and becomes the reason of earth warming and greenhouse effect causing global warming. The most important contributors of causing greenhouse effect are carbon dioxide gas, water vapour, methane and ozone.
Coal and oil mining releases the methane gas to the atmosphere. Other natural leakage causes additional source of methane release. Human being are cutting down trees and forests to a great level per year which affect the natural carbon cycle and cause carbon dioxide gas to store in the atmosphere. Plants are considered as the main source to utilise all the carbon dioxide gas on the earth. In this way the increasing concentration of carbon dioxide gas causes increase in the greenhouse effect which again warm the atmosphere by increasing temperature.
Release of nitrous oxide from the fertilizers (used for crops) and gases used in the refrigerator including other industrial processes are also the main factors of global warming. Melting ice releases methane as ice has trapped a compound called methane clathrate which released after melting. Also the ice caps and glaciers reflect sunlight back to the space (means preventing earth from high temperature sun rays) and after melting of ice this process stops and causes earth to warm. Burning of wood at high level releases the oxidizable carbon in the earth atmosphere which ultimately elevates earth temperature. An emission of chlorofluorocarbons (used in the freeze) is the major reason of abnormal earth warming. It does not trap heat however it releases chlorine in the presence of UV sun rays which goes to the atmosphere and weakens the ozone layer by changing ozone molecules into the oxygen molecules.