Multiple choice general knowledge science & technology Percentage of Nitrogen in air is ___________ 90.08 88.98 77 78.08 Reveal answer Fill a bubble to check yourself D Correct answer Explanation Earth's atmosphere is composed of about 78.08% nitrogen, making it the most abundant gas. This is followed by oxygen at approximately 20.95%. The remaining 1% consists of argon, carbon dioxide, and other trace gases.