Question

Why is there so much more carbon dioxide in the atmosphere of Venus than in that of Earth? Why so much more carbon dioxide than on Mars?

Answer 1

The presence of a thick carbon dioxide atmosphere on Venus resulted in its high surface temperatures. Earth's lower concentration of carbon dioxide is a result of the presence of life forms that removed the CO2. Mars has a similar amount of carbon dioxide as Venus but lacks an active greenhouse effect.

Step-by-step explanation:

The reason there is so much more carbon dioxide in the atmosphere of Venus compared to Earth and Mars is due to the different evolutionary paths each planet has taken. Venus has a thick carbon dioxide atmosphere that traps heat, resulting in extremely high surface temperatures. This is known as the greenhouse effect. The high temperatures on Venus caused the planet to lose its water and undergo a runaway greenhouse effect, leading to the accumulation of a massive amount of carbon dioxide.
Earth, on the other hand, has a much lower concentration of carbon dioxide in its atmosphere because of the presence of life. Living organisms on Earth, through processes like photosynthesis, have removed carbon dioxide from the atmosphere and deposited it in sediment, resulting in a deficiency of CO2. Mars, which also has a thin atmosphere, ended up with a similar amount of carbon dioxide as Venus due to the absence of water, but the lack of an active greenhouse effect keeps the temperatures on Mars much lower.

Answer 2

Step-by-step explanation:

The reason for the more concentration of carbon dioxide in the atmosphere of Venus than in the Earth -

On the Earth , most amount of the carbon dioxide is in the ocean water and in sea sediments .

Considering Venus , in the planet Venus , there is no Ocean water , hence , carbon dioxide can not get dissolved into the water , hence , it is found in the atmosphere .

So , the escape velocity for carbon dioxide on Mars is smaller than Venus .