Does Human Activity Produce Global Warming

744 words - 3 pages

For many years, the topic of global warming has been of great debate in Australian politics. In a bid to lessen global warming and the devastating repercussions it has on the environment, a substantial amount of time and money has been invested into discovering the factors that cause and contribute to global warming. Human activity in particular has come under attack as probable factor in being a major contributor in causing global warming. The significant increase in attention given to the impact of human activity on the Earth has sparked an interest in me personally to determine whether or not human activity is a major sponsor that produces global warming.
The expression "global warming" is defined as a growth in the Earth's average global temperature due to a portion of the Earth's outward ultraviolet energy that is reserved by several trace gases in the atmosphere whose concentrations have been growing because of many different influences. These gases have the capability to absorb radiation, directing to the inclination of the atmosphere to produce scorching climates than would otherwise be the circumstance.
The most significant naturally occurring trace gases that acquire these abilities are; water vapour (H2O), carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), and ozone (O3). Additionally, there are manufactured gases that are particularly effective in absorbing radiation. These gases include; chlorofluorocarbons (CFC’s), perfluorocarbons hydrochlorofluorocarbons, hydrofluorocarbons (HFCs), and sulphur hexafluoride (SF6).
These gases are similar to the gases in a greenhouse, which too leads to the net trapping of infrared radiation, hence the term "greenhouse gases" (B, James. 1996). These greenhouse gases perform as an incomplete blanket for the thermal radiation and create a warmer atmosphere than would otherwise be the case. Prior to human interference, the Earth's radiation balance was stable, resulting in a average temperature of the Earth at 15°C. Deprived of the presence of naturally befalling greenhouse gases, the Earth's normal surface temperature would have been −18°C. This difference of 33°C is because of the natural greenhouse effect, which has consequently caused the Earth to be a liveable planet.
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