What is the most abundant gas in the Earth's atmosphere?
The most abundant gas in the Earth's atmosphere is nitrogen, which comprises around 78% of the air we breathe. Oxygen, the second most common gas, makes up approximately 21% of the Earth's atmosphere. Trace amounts of other gases, such as carbon dioxide, helium, neon, and hydrogen, account for the remaining 1%. Nitrogen is essential for plant growth and plays a critical role in the Earth's ecosystem. It is also used in various industrial and manufacturing processes.
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