> at 43 percent a lightning strike will cause the entire atmosphere to ignite since it is so high in flammable oxygen
Good article except oxygen is not flammable. Oxygen is the stuff that makes other stuff flammable.
Imagine forest fires at 43% oxygen.
Right, oxygen is an oxidizer, not a fuel. A world with 43% oxygen would have some pretty terrifying wildfires, but the sky wouldn't just burst into flames