Question

During an early phase of the planet's existence, earth's atmosphere was similar in composition to the atmospheres of mars and venus. At that time earth's principal atmospheric gas was:

Answer 1

Answer:

hiii

Explanation:

Its early atmosphere was probably formed from the gases given out by volcanoes. It is believed that there was intense volcanic activity for the first billion years of the Earth'sexistence. The early atmosphere was probably mostly carbon dioxide, and less or no carbon dioxide