Oxygen was generally absent from the atmosphere during the Early Archean Era.
Earth forming from a mass of dust and gas :)
Oxygen
dust and gas
Carbon dioxide, CO2
Oxygen did not exist in the early atmosphere. Early life took in carbon dioxide and sunlight, exhaling oxygen as a waste gas. After a few million years, this waste gas became a significant part of the atmosphere, enough so that new opportunistic species could use it for respiration.
Oxygen
Oxygen Please study this, & don't forget it so you don't have to keep looking up answers .
Earth forming from a mass of dust and gas :)
The Victorian Era was in the early 1900's. The most used form of lighting during this era was gas lighting. Candles were still used at this time as well.
oxygen
It's what we breathe, Oxygen.
laughing gas
Oxygen
Oxygen
oxygen
Methane gas
An engine of that era would run better on leaded gas.