The United States and Soviet Union recognized the need to agree on appropriate measures related to peaceful nuclear explosions (PNE)<span>.</span>
Neither
hope this helps!!!
Answer:
In simple words, there existed no living on Earth for the first few million years since the environment was unsuitable for life. The original atmosphere of the Earth had a lot of water vapor but practically little oxygen. Volcanic activity blasted substances into the atmosphere such as nitrogen, carbon dioxide, hydrogen, and water vapor, but no pure oxygenation.
