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Bookmark or Share- Air | Composition, Oxygen, Nitrogen | BritannicaAir, mixture of gases comprising the Earth’s atmosphere. The mixture contains a group of gases of nearly constant concentrations and a group with concentrations that are variable in both space and time.
- Air Pollution Facts, Causes and the Effects of Pollutants in the Air - NRDCThe effects of air pollution wreck havoc on human health and our planet as a whole. Learn about what causes air pollution and how to help reduce the effects.
- The Chemical Composition of Air - ThoughtCoThe primary component of air is nitrogen gas. Nitrogen, oxygen, water vapor, argon, and carbon dioxide account for about 99% of the composition of air. Trace gases include neon, methane, helium, krypton, hydrogen, xenon, ozone, and many other elements and compounds.
- Atmosphere - National Geographic Societymesosphere. noun. region in Earth's atmosphere between the stratosphere and the thermosphere, about 50-80 kilometers (31-50 miles) above the Earth's surface. meteor. noun. rocky debris from space that enters Earth's atmosphere. Also called a shooting star or falling star. ozone layer. noun.
- Air - Simple English Wikipedia, the free encyclopediaAir is a mixture of many gases and tiny dust particles. It is the clear gas in which living things live and breathe. It has an indefinite shape and volume. It has mass and weight, because it is matter. The weight of air creates atmospheric pressure. There is no air in outer space .
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