Question

What will happen if the level oxygen is decreased to 0.01 %

Answer 1

there are many effect pn earth like
some animals will die
peples will die
some plants will decrase
there is also chance of some diseases
to we,animals,plants etc

Answer 2

the carbon-dioxide level will increase
animals will die
we have to use oxygen gas cylinder for our own lives
but when the CO2 increases the plants start time give oxygen (if plants and trees are present)