it is what we breathe.
Oxygen comes from trees you need oxygen to breath
To breath!
you can breathe
plants give us oxygen and take carbondioxide
blood oxygen meters
creates oxygen
oooo?!!?!? You breathe it!!! If there wasn't any oxygen we would all die.
Plants expel oxygen as a byproduct of photosynthesis. This process takes carbon dioxide and breaks it into carbon and oxygen.
adding oxygen
They provide Oxygen and food for us.
use of oxygen increases the energy output of suger burning almost 20 fold
Its an element of vital importance in the growth and health of plants and animals.