The primitive earth atmosphere is hypothesized to have consisted of:?
I’m resubmitting my answer. Popular views on evolution include the concept that life originally arose from non-living chemicals through the interaction of matter and energy. In their research into the possible chemical environs and reactions necessary for such an event, many early evolutionary researchers (pre 1930) assumed that the earth’s atmosphere had never been radically different than the present, i.e. contained free oxygen (O2), nitrogen (N2) and minor carbon dioxide (CO2). However, it was soon realized that chemical research using this assumption was doomed to failure, since the organic molecules needed for the biological processes, e.g. sugars and amino acids etc. are unstable in the presence of compounds such as O2, H2O, CO2. In fact, under such conditions, ‘biological’ molecules would be destroyed as fast as they could be produced. It would be impossible to produce such molecules in the presence of an oxidizing atmosphere. Most theorists rationalized that the only way to avo