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which gas leaves less green house effect?

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CO2 and methane (CH4) leaves green house effect

These greenhouse gases absorb the heat
The atoms of these molecules are held loosely and when they absorb heat they start vibrating and transmit the heat radiation to another gas molecule.This process keeps heat near the earth surface and thus causing greenhouse effect.
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In my view carbon monoxide and hydrogen chloride because some molecules contains only two atoms of different elements they absorb infrared radiation but these molecules are short lived in the atmosphere owing to their reactivity or solubility.
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Carbon dioxide (CO2): Carbon dioxide enters the atmosphere through burning fossil fuels (coal, natural gas, and oil), solid waste, trees and other biological materials, and also as a result of certain chemical reactions (e.g., manufacture of cement). Carbon dioxide is removed from the atmosphere (or "sequestered") when it is absorbed by plants as part of the biological carbon cycle. Methane (CH4): Methane is emitted during the production and transport of coal, natural gas, and oil. Methane emissions also result from livestock and other agricultural practices, land use and by the decay of organic waste in municipal solid waste landfills. Nitrous oxide (N2O): Nitrous oxide is emitted during agricultural, land use, industrial activities, combustion of fossil fuels and solid waste, as well as during treatment of wastewater. Fluorinated gases: Hydrofluorocarbons, perfluorocarbons, sulfur hexafluoride, and nitrogen trifluoride are synthetic, powerful greenhouse gases that are emitted from a variety of industrial processes. Fluorinated gases are sometimes used as substitutes for stratospheric ozone-depleting substances (e.g., chlorofluorocarbons, hydrochlorofluorocarbons, and halons). These gases are typically emitted in smaller quantities, but because they are potent greenhouse gases, they are sometimes referred to as High Global Warming Potential gases ("High GWP gases").
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Natural gas is a relatively clean-burning fossil fuel

Burning natural gas for energy results in fewer emissions of nearly all types of air pollutants and carbon dioxide (CO2) than burning coal or petroleum products to produce an equal amount of energy.
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Among the commonly emitted greenhouse gases, certain gases have a lower global warming potential (GWP) compared to others. Global warming potential is a measure of how much heat a greenhouse gas traps in the atmosphere over a specific time period, relative to carbon dioxide (CO2), which is assigned a GWP of 1. The lower the GWP, the less impact a gas has on global warming over time.

One gas that is often considered to have a lower greenhouse effect is methane (CH4) compared to carbon dioxide. Despite methane being a potent greenhouse gas with a higher heat-trapping ability per molecule than CO2, it has a shorter atmospheric lifespan, breaking down more quickly. Consequently, methane's impact on global warming over a 20-year period is about 84 to 87 times greater than that of CO2, but over a 100-year period, it is about 28 to 36 times greater. 

However, it's important to note that reducing emissions of all greenhouse gases, including methane, is crucial for mitigating climate change and minimizing its impacts. Additionally, strategies that focus on reducing emissions of CO2, methane, nitrous oxide, and other potent greenhouse gases collectively contribute to efforts to combat global warming and reduce the overall greenhouse effect.
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