How much percentage of carbon dioxide is present in the atmosphere of

How much percentage of carbon dioxide is present in the atmosphere of Venus and Mars ?

[amp_mcq option1=”45 – 47%” option2=”52 – 55%” option3=”74 – 77%” option4=”95 – 97%” correct=”option4″]

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UPSC CDS-2 – 2023

The atmospheres of both Venus and Mars are predominantly composed of carbon dioxide. Venus’s atmosphere is about 96.5% CO2, and Mars’s atmosphere is about 95% CO2. Option D, 95 – 97%, is the range that accurately represents the high percentage of carbon dioxide in the atmospheres of both planets.

The thick CO2 atmosphere of Venus creates an extreme greenhouse effect, resulting in very high surface temperatures. The thin CO2 atmosphere of Mars contributes to its cold and arid conditions.

In contrast, Earth’s atmosphere is composed primarily of nitrogen (about 78%) and oxygen (about 21%), with carbon dioxide being only a trace gas (around 0.04%), although its concentration is increasing due to human activities. The composition of planetary atmospheres is a key factor determining their climate and potential for life.

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