The early Earth had a reducing atmosphere, made up predominantly of methane, ammonia, and water vapor. All of these (except water vapor) are now present in trace quantities only; the atmosphere is now predominantly nitrogen and oxygen.
The primitive atmosphere was mainly composed of CO2. However, with the emergence of life, this CO2 was reduced in photosynthesis and increased Oxygen. Now our atmosphere is mainly composed of...
Earth's early atmosphere contained a lot of water vapors and other gases, such as carbon dioxide, hydrogen sulfide, and nitrogen, and was extremely hot. During earth's youth, the sun's light barely...
The earth's early atmosphere was made up of 98% carbon dioxide with some water vapour, ammonia and methane. The water vapour condensed to form oceans Plants intook CO2 to produce O2 by photosynthesis...