All living things (except plant matter) nead oxygen, and we inhale it to fuel our muscels. What we exhale is Carbon Dioxide. Plants transform Carbon Dioxide into Oxygen during the process of photosynthesis, so as long as there are trees or plants it really doesn't matter.
How much fresh water left in the world for our future generation and how we can save it.
10 percent of the world is left handed.
2 Migratory birds are left.
The Amazon produces up to 25 - 30% of the world's oxygen.
There are only about 5900 piping plovers left in the world.
About 50
Grass produces about half of the world's oxygen through photosynthesis.
The left atrium receives oxygen rich blood from the pulmonary circulation. It then pumps that blood into the left ventricle.
200 years
non there are dead
about 5 i think
OVER 90000000000000000