Want this question answered?
photosynthesis
Volcanic eruptions
Yes
mostly carbon dioxide with little or no oxygen.
Oxygen Please study this, & don't forget it so you don't have to keep looking up answers .
yes
oxygen
oxygen
nitrogen
Volcanic eruptions
Volcanic eruptions, they produced a lot of carbon dioxide which made up the early atmosphere.
nitrogen
photosynthesis
no
photosynthsis
Photosynthesis by plants
Yes you can get an early warning from local athorities