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carbon dioxide
Venus has 96 percent of carbon dioxide
Mars
earth
Venus.
Mars is the terrestrial planet with a thin carbon dioxide atmosphere. Venus also has an atmosphere of carbon dioxide, but it is very thick.
Such an atmosphere on a planet would be the result of carbon dioxide emitted from volcanoes.
Venus has the thickest carbon dioxide atmosphere.
Earth, Mars and venus all have nitrogen and Carbon dioxide in their atmosphere, though the levels vary from planet to planet.
Mars is known as the red planet. The planet itself is mostly rock. It is the thin atmosphere that is mostly carbon dioxide.
Venus
EARTH
carbon dioxide
Venus and Mars both have atmospheres dominated by carbon dioxide. Both are composed of more than 90% carbon dioxide.
Venus has 96 percent of carbon dioxide
Venus
Mars