Once Shoko Ieiri confirmed that Satoru Gojo had merely suffered pure oxygen poisoning, she relaxed instead.
"There is, actually."
She took another drag of her cigarette and patiently explained to Yuji Itadori:
"Oxygen is harmless at low concentrations, but once the concentration rises, it becomes dangerous. At best, it damages the alveoli and capillaries, causing hypoxia. At worst, it can even lead to death!"
Yuji sucked in a sharp breath.
"Damn! That's terrifying! You can get poisoned in less than two minutes?"
Shoko shook her head, equally puzzled.
"Logically, that shouldn't happen. Oxygen poisoning requires an environment with an extremely high oxygen concentration."
Even Shoko could not understand why Gojo had somehow suffered pure oxygen poisoning.
Although many oxygen tanks on the seafloor were releasing oxygen, the oxygen should have diluted as it rose. It should not have reached the concentration required for pure oxygen, right?
Then Yuta Okkotsu suddenly thought of something.
He looked up in shock and shouted.
"It was the chlorine gas from earlier!"
With Yuta's reminder, the few graduates of Jujutsu High present vaguely guessed what had happened.
Earlier, Jie Jian had produced a massive amount of chlorine gas by electrolyzing seawater.
To prevent himself from being poisoned by chlorine gas, Gojo had used Limitless to block the chlorine from entering.
At the same time, to avoid inhaling other poisonous gases, he had surely reduced the intake of other unknown gases as well.
By the principles of relativity, when one thing decreased, another had to increase.
Gojo had reduced his intake of other gases, so the oxygen he considered harmless had increased in proportion!
Furthermore, oxygen was a gas unrelated to cursed energy, so it could drift directly into Gojo's domain.
Under normal circumstances, the oxygen concentration inside the domain would only have been slightly higher