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Oxygen, Nitrogen and Carbon dioxide, in that order. The most important element to sustaining life is Oxygen.
Oxygen is used and CO2 is produced
after oxygen it is the most abundant element on earth.
Deforestation reduces the gross amount of oxygen produced by an ecosystem it reduces the amount of oxygen produced .
By plants and planktonMost of the Earth's oxygen is produced by plants, both on surface and under water. Algae.
Elemental oxygen did not appear on Earth until some time after life did. In fact, the oxygen was produced by life carrying out photosynthesis. The first organisms on Earth were anaerobic, meaning their life processes did not involve oxygen. To most organisms like this, oxygen was highly toxic.
All of them exhale carbon dioxide.
Most of the worlds oxygen is produced by Trees.
No. Earth's atmosphere most likely originate from volcanic atmosphere. The oxygen is produced by plants.
About 2% of the Earth's oxygen it produces.
From primitive bacteria that produced oxygen as a waste product.
Cyanobacteria produced oxygen through photosynthesis which led to the oxidizing of earth.
Oxygen is the most abundant element in Earth's crust.