the earth 's atmosphere is made of 036 percent carbon dioxide by volume
composition_of_earth is 35_percent_iron. composition_of_earth is not 28_percent_oxygen. composition_of_earth is 0.4_percent_aluminum. composition_of_earth is 2.7_percent_nickel. composition_of_earth is 12.7_percent_nickel. atmosphere_of_venus is 98_carbon_dioxide. earth has atmosphere atmosphere_of_mars is 98_carbon_dioxide. composition_of_earth is 28_percent_oxygen. atmosphere_of_mars is not 98_carbon_dioxide.