I don't know what the figure is, but it must be pretty low because carbon monoxide is poisonous and we don't seem to suffer too much.
1 percent of the earths atmosphere is made of the following: - Argon (0.93%) - Carbon dioxide (0.03%) - Neon> trace - Helium> trace - Methane> trace - Krypton> trace - Xenon> trace - Hydrogen> trace - Ozone> trace 21% of earths atmosphere is made of oxygen 78% of earths atmosphere is made of nitrogen
97%
nitrogen
In the atmosphere, in the form of carbon dioxide
Nitrogen does
argon
Argon makes up about .93 percent of the Earths atmosphere. Hope this helps! (:
A majority of the earths carbon is located in the ocean.
Nitrogen makes up about 78 percent of Earth's atmosphere.
Earth's atmosphere is mostly made up of nitrogen, which makes up 79 percent. The atmosphere contains 20 percent oxygen and 1 percent other gases.
Oxygen is the gas that accounts for about 20 percent of Earth's atmosphere.
The approximate percent of oxygen in Earth's lower atmosphere is around 20.95% by volume.