What would happen if 80% of the oxygen was to disapear?

Question

as the ocean produces 80% of the worlds oxygen and this comes from green algae what would happen if green algae would happen to go extinct and there was nothing we could do about it?

Answer 1

Everything living would die instantly because all living things necessarily include water as a fundamental part of their makeup and if 80% of the oxygen disappear this would mean that most of the water would turn to hydrogen gas.

If you were watching safely from space the surface of the planet would appear to collapse as the majority of it is covered with things that are made up of oxygen containing molecules and these would all crumble or deform in some other way.

Answer 2

all animal and plants will dye only anaerobic and chemoheterotrophs will remain

Answer 3

Every living being that requires oxygen for aerobic respiration would die but the organisms that can respire anaerobically could survive.

Answer 4

., definitely we will die, except from other organisims

Answer 5

For starters people can't stay conscious in 20% oxygen level without any special training. That's about the concentration of oxygen at the top of Mount Everest.

  It would probably mean the extinction of our species except for a limited number of people living in controlled man-made environments. That is presuming that there was enough time to build these environments.

  I've never heard of plants living at those kind of altitudes. So we would have to have an artificial environment for the plants as well as the animals.

  I don't know about life in the sea. I am sure most of it would die, but there are a few simple plants that seem to survive in the most hostile places on the planet.

Answer 6

Everyone would die