How was the atmosphere on Earth first formed?
(a) Spontaneous combustion.
(b) By comets and meteors, which were much more common at that
time, delivering volatiles.
(c) Evaporation from the ocean.
(d) Volcanic emissions.
(a) Spontaneous combustion.
(b) By comets and meteors, which were much more common at that
time, delivering volatiles.
(c) Evaporation from the ocean.
(d) Volcanic emissions.