Multiple choice general knowledge science & technology

What is the main gas found in the air we breathe?

  1. Nitrogen

  2. Oxygen

  3. Helium

  4. CO2
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Earth's atmosphere is approximately 78% nitrogen, making it the most abundant gas by far. Oxygen is second at about 21%, with trace gases like argon and CO2 making up the remaining 1%.

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