A greenhouse gas sometimes abbreviated GHG is a gas that absorbs and emits radiant energy within the thermal infrared range, causing the greenhouse effect. Hence they are almost totally unaffected by infrared radiation. Some molecules containing just two atoms of different elements, such as carbon monoxide CO and hydrogen chloride HCl , do absorb infrared radiation, but these molecules are short-lived in the atmosphere owing to their reactivity or solubility. Therefore, they do not contribute significantly to the greenhouse effect and often are omitted when discussing greenhouse gases. Greenhouse gases are those that absorb and emit infrared radiation in the wavelength range emitted by Earth.
11 Facts About Global Warming | andaluciapodemos.info
Small changes in the atmospheric concentration of these gases can lead to changes in temperature that make the difference between ice ages when mastodons roamed the Earth, and the sweltering heat in which the dinosaurs lived. The second is the atmospheric lifetime, which measures how long the gas stays in the atmosphere before natural processes e. This is often calculated over years, though it can be done for any time period. A gas with a long lifetime, but relatively low radiative efficiency, may end up exerting more warming influence than a gas that leaves the atmosphere faster than the time window of interest but has a comparatively high radiative efficiency, and this would be reflected in a higher GWP. These values are periodically updated by the scientific community as new research refines estimates of radiative properties and atmospheric removal mechanisms sinks for each gas.
U.S. Energy Information Administration - EIA - Independent Statistics and Analysis
It seems like an issue that is not going to go away, and it is going to stick around for some time. As early as in , Al Gore, the former vice-president of the United States, said that the burning of the fossil fuels was one of the reasons that increased the amount of carbon dioxide, and he said that if carbon dioxide could melt the polar. Gases in the atmosphere that absorb radiation and have a big impact towards the greenhouse effect are known as the Greenhouse gases.
Attention- Getting Device: Gain the attention of the audience In the past 1, years, the earth has not experienced such a warming trend as we are having now 2. Purpose and Thesis: Inform the audience of the purpose of your speech and state your thesis My purpose of this speech is to mention how global warming occurs and. Prepare a plan for each of the topics; write a thesis statement and complete the introduction 1. Marijuana should be legal, because it is harmless, and it is an effective medicine for many kinds of diseases.