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The atmosphere
oxygen
oxygen
The four main layers of the atmosphere are the exosphere, where satellites orbit; the thermosphere, where temperatures increase; the mesosphere, where meteors are slowed down; and the troposphere, where life thrives.
Nitrogen is the least abundant element in the atmosphere of the Earth. The most abundant element in the atmosphere of the Earth is oxygen.
Nitrogen.
argon?
This gas is nitrogen.
The atmosphere
that sounds unanswerable.
Everywhere, at least on earth and in the earths atmosphere.
The heaviest ones.
argon
oxygen
oxygen
It has to travel at least 17,000MPH.
At 0.3%, carbon dioxide is the least common gas in the Earth's atmosphere. This is in no way indicative of its lack of importance, since carbon dioxide is the primary source of life on earth and its concentration on earth's pre-industrial atmosphere has been regulated by photosynthetic organisms and is a principle supplier of greenhouse gases.