A major element on earth?

or:A major element on earth?or:There are many elements on earth and I would guess that the major elements would include carbon and Iron ore, assuming

or:A major element on earth?

or:There are many elements on earth and I would guess that the major elements would include carbon and Iron ore, assuming that you are including the whole earth not just the crust.

or:The major element on earth was atomic faction.

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