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About 21 of the Earth's atmosphere is made up of oxygen.
About 78 of the Earth's atmosphere is made up of nitrogen.
The present-day continents that made up Gondwana are South America, Africa, Antarctica, Australia, the Indian subcontinent, and the Arabian Peninsula.
gaylord nelson
The present day states were: Cananda, Florida, and the southern border.
About 78 of Earth's atmosphere is made up of nitrogen.
About 78 of the Earth's atmosphere is made up of nitrogen.
Not all of the elements are present in the Earth's atmosphere.
New Mexico
Germany and France
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As many as we might want if we ever start living there. Hours are made up by people.