The early atmosphere on Earth was mostly carbon dioxide.
It was also poisonous and extremely hot.
Atmosphere is the gaseous envelope of a planet.
Today's atmospheric functions include sustaining life with oxygen, produced from plants; filtering harmful rays from the sun, helping in protecting the Earth from meteor collisions.
Captain Robert Moffat Losey
Napoleon’s conquest spread new ideas from the French Revolution throughout Europe
Answer: Athens and Sparta
Explanation: