other oxygen-producing organisms would gradually struggle to survive under increasingly difficult conditions.
As a result, atmospheric oxygen levels could eventually fall dramatically.
Most Complex Life Would Eventually Disappear
A significant reduction in oxygen would have enormous consequences for life on Earth.
Humans, animals, and many other organisms depend on oxygen for survival. If oxygen levels fell far below today’s levels, complex life would eventually become impossible.
According to the scenario described in the article, a mass extinction would occur as Earth’s environment became increasingly hostile.
Eventually, only certain microorganisms capable
