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50 to 85 percent.
In modern times - up to 1975 at least - 70% of the Earth's Oxygen {O2} is produced exclusively by phytoplankton.
The oxygen is produced by phytoplankton in the top layers of the Ocean, especially by desmids, diatoms and dinoflagellates---tiny single Celled organisms with shells made of 'glass'.
Wiki User
∙ 11y ago
Wiki User
∙ 12y agoThe anser is 85%.
LOL That is not the answer :)
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What do plants give us back when you give them oxygen?
Plants give us oxygen and when we breathe it in we exhale carbon dioxide.
How is oxygen processed for us?
Trees give us oxygen. We breathe in oxygen and we breathe out carbon dioxide, which is what trees need.
On what does the Earth rely for oxygen?
Well plants and trees because they are the opposite to us they breath in CD and breath out oxygen!
Why are plants important to grasslands?
grass important because it is a plant and gives us us oxygen
How does biodiversity help humans?
biodiversity helps us because the plants give us oxygen
What type of resources did the ocean give us?
Foods, metals, transportation, energy and oxygen.
Do trees have energy?
They have as much energy to give us oxygen.
What do plants give us back when you give them oxygen?
Plants give us oxygen and when we breathe it in we exhale carbon dioxide.
How much oxygen does one piece of paper give us?
None. It's an inert object.
Are trees helpful?
Yes they are they give us paper and they give us oxygen
What 5 example of what plants give us?
plants give us oxygen
How is oxygen processed for us?
Trees give us oxygen. We breathe in oxygen and we breathe out carbon dioxide, which is what trees need.
What is at the foundation of the ocean food chain gives us oxygen?
phytoplankton
What do the plants give us?
plant give us air or oxygen in scientific called
How emportant is nature to us?
Nature is helpful in many ways, trees give us oxygen to breathe, bees pollinate flowers to give us fruit, swallows stop us getting overrun by flies, its way too much to say in one wikianswer! XD
What helps us live?
The oxygen that plants give us and our lungs
How plants are useful?
They give us oxygen, and help us to stay alive without plants we wouldnt be alive
