Answer:
The invisible gaseous substance surrounding the earth, a mixture mainly of oxygen and nitrogen
Explanation:
It contains 78% Nitrogen, 21% Oxygen and 1% Carbon dioxide, argon, water vapour and other gases
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Answer:
The invisible gaseous substance surrounding the earth, a mixture mainly of oxygen and nitrogen
Explanation:
It contains 78% Nitrogen, 21% Oxygen and 1% Carbon dioxide, argon, water vapour and other gases