A few seconds without oxygen could spell the end of life as we know it
If all the oxygen disappeared from the water molecules in Earth’s oceans we’d end up with seas of explosive hydrogen gas.
If 21 per cent of the atmosphere suddenly disappeared, the pressure change would trigger swirling winds.
The ozone layer (which is made from oxygen) would disappear, showering Earth in intense ultraviolet radiation.
Hydrogen is the smallest, lightest element, so Earth’s oceans would boil away into space.
If oxygen suddenly disappeared from the rocks the ground would begin to crumble.
Carbon from carbon dioxide would drop out of the air, leaving an atmosphere of inert nitrogen.