phytoplankton :)
No, oxygen makes up about 21% of Earth's atmosphere. The majority of the atmosphere is made up of nitrogen (roughly 78%).
Nitrogen, with oxygen making up most of the remaining 20 percent. Other gases such as argon, carbon dioxide, and trace amounts of other gases make up the rest of the Earth's atmosphere.
Nitrogen makes up around 78% of the Earth's atmosphere, while oxygen makes up around 21%.
About 78 percent of the Earth's atmosphere is made up of nitrogen.
No, hydrogen makes up about 0.00005% of the Earth's atmosphere. The majority of the air we breathe is nitrogen (about 78%) and oxygen (about 21%).