Give scientific reasons: Life originated from the Earth's inorganic atmosphere in the past,but this no longer happens today.

(N/A) Life cannot originate in the present-day atmosphere due to the following reasons:
$1$. The temperature of the present-day atmosphere is significantly lower than that of the primitive atmosphere,which was essential for the synthesis of complex organic molecules.
$2$. The present-day atmosphere is oxidizing in nature due to the high concentration of free oxygen,whereas the primitive atmosphere was reducing,which favored the formation of organic compounds.