Explanation:
The atmosphere is more than just layers of gases surrounding the planet.While the majority of the atmosphere is composed of nitrogen (N2) molecules, there are also oxygen and carbon dioxide (CO2) which plants and animals need to survive.
Answer
Yes, with a trace of a few elements it practically is just gas protecting us all.
Answer:
need more information to answer
About 3.8 billion years ago
Why would I explain?
