What do theories hypothesis about the conditions of earth's early atmosphere?

In the conditions of earths early atmosphere, oxygen was limited and most of the atmosphere would be filled with noxious methane, carbon monoxide, hydrogen sulfide, and ammonia.

Hope this helped :)

1) the mayans built pyramids just like the egyptians. the mayans also used hieroglyphics like them.2) power was passed down by family. for example, if the father dies, the son would be the next king.3)they both built pyramids for their structures.4)the main crop for the mayans was maize.5)they also grew manioc, beans,  squash,  amaranth, and chile peppers.