What Are the Four Main Gases in the Atmosphere?

Answer

There are various gases in the atmosphere, but the four main gases are nitrogen, oxygen, carbondioxide and hydrogen. Other gases are krypton, ozone, neon and methane. Besides these gases, there is water vapour in the atmosphere.
Q&A Related to "What Are the Four Main Gases in the Atmosphere"
Earth's atmosphere: 78.08% nitrogen, 20.95% oxygen, 0.93% argon, 0.038% carbon dioxide, and trace amounts of other gases.
http://wiki.answers.com/Q/What_3_main_gases_of_the...
The atmosphere is a mixture of gases that surround the Earth. It is essential to all life and serves several purposes, such as providing air for respiration, absorbing harmful ultraviolet
http://www.ehow.com/list_7148375_three-abundant-ga...
The primary gases that make up the Earth's atmosphere are Nitrogen
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89.8±2.0% Hydrogen (H2). 10.2±2.0% Helium. ~0.3% Methane. ~0.026% Ammonia. ~0.003% Hydrogen deuteride (HD). Save. 0.0006% Ethane. 0.0004% water.
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