text: And anouther reson on why we need to keep exploring mars is how there is 97% of carbon dioxide in the ai. and one pice of evidence from the text is "A thick atmoshere of almost 97 percent carbon dioxide. " And that is anouther reson to keep studdying mars, because we can learn how is was created and how it got there and also how long people live there before they die so many posibilatys that we can have about gasmask and air chambers.