Mars is the only planet that is thin and is made up of only carbon dioxide. :)
(Question to asker): Define "thin" at what part of it is made of CO2? But you probably mean the atmosphere so in that case then the answer above is correct... mostly.
The inner planet that has an atmosphere containing mostly carbon dioxide is Venus. It has an extremely dense atmosphere, made up mostly of carbon dioxide with small amounts of nitrogen and trace amounts of other gases. The thick atmosphere contributes to Venus' extreme greenhouse effect, making it the hottest planet in the solar system.
Mars, Venus's atmosphere is thicker than Earth's. Much thicker.
Mars does
Dense, and made mostly of Carbon Dioxide>
Venus has a thick atmosphere primarily composed of carbon dioxide, with trace amounts of other gases such as nitrogen and sulfur dioxide. The extreme greenhouse effect on Venus has led to surface temperatures hot enough to melt lead.
Mars is known as the red planet. The planet itself is mostly rock. It is the thin atmosphere that is mostly carbon dioxide.
Venus
I believe the planet with low air pressure and that is mostly made of CO2 is Mars.
It's rocky, but it has an atmosphere made up mostly of carbon dioxide and has clouds made of sulfuric acid.
Mostly made of Carbon Dioxide(Co2).
The inner planet that has an atmosphere containing mostly carbon dioxide is Venus. It has an extremely dense atmosphere, made up mostly of carbon dioxide with small amounts of nitrogen and trace amounts of other gases. The thick atmosphere contributes to Venus' extreme greenhouse effect, making it the hottest planet in the solar system.
Mars, Venus's atmosphere is thicker than Earth's. Much thicker.
Earth
veinus
carbon dioxide
It is mostly carbon dioxide, 97 %, at a pressure 90 times that of earth's atmosphere at sea level.
Mars does