If the percentage of atmospheric oxygen increased only by about 4% the atmosphere would likely become a giant fireball.

Question

Quizplus · Accepted Answer

Oxygen is a highly reactive gas and supports combustion. If the percentage of atmospheric oxygen increases beyond a certain threshold, it can make things easier to ignite and burn more intensely. This is because oxygen not only supports combustion, but also enhances it by accelerating the burning process. Hence, if the percentage of atmospheric oxygen increases more than normal, it can cause spontaneous combustion, making the atmosphere highly flammable and eventually leading to a giant fireball.

If the Percentage of Atmospheric Oxygen Increased Only by About