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trace gas is a gas that makes up an extremely small portion of a mixture of gases.

When discussing climate changetrace gas refers to any of the less common gases found in the Earth’s atmosphere.

Essentially, nitrogen and oxygen are the most common gases representing about 78.1% and 20.9% of the Earth’s atmosphere respectively.

Hence, every other gas is considered a trace gas.

These include:

Despite their very small concentrations, trace gases have several important effects on both the Earth’s weather and climate.

More importantly, many of the gases mentioned above are greenhouse gases responsible for the greenhouse effect.

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