Grass gives off more oxygen than trees.
Grass produces more oxygen per acre than mature trees do.
An acre of grass can produce enough oxygen that is needed for 64 people per day.
And an acre of trees can produce enough oxygen for 18 people.
Although trees make wood, trapping carbon much longer term and so trees are better than grass at producing more NET oxygen.
While trees can store more carbon than grass, the storage of carbon in grass is often more stable because most of it is below ground.
This makes it less likely for the carbon to be lost to the atmosphere during fires, floods or droughts.
While grass and trees produce oxygen, plankton actually produces the most oxygen on earth and is the number 1 source of oxygen.
Plankton which are tiny drifers play a huge role in the aquatic ecosystems.
And many animals which include whales also rely on plankton for food.
Plankton are plants that are known as phytoplankton and grow and get their own energy through photosynthesis and are also responsible for producing around 80 percent of the worlds oxygen.
Both trees and grass produce oxygen through photosynthesis which is a process in which the grass and trees convert sunlight, water and carbon dioxide into sugars for energy and then release the oxygen as a byproduct.
Grass and trees play a role in contributing to the oxygen levels in the atmosphere, although trees store more carbon in their woody biomass.