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Air India offers non-stop flights to various destinations across Asia, Australia, Europe, the Middle East, and North America. Book online and enjoy discounts, bonus points, and exclusive services with Air India.
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- Original Atmosphere
- Second Atmosphere
- Third Atmosphere
At first it was mainly a hydrogen atmosphere. It has changed dramatically on several occasions—for example, the Great Oxygenation Event 2.4 billion years ago, greatly increased oxygen in the atmosphere from practically no oxygen to levels closer to present day. Humans have also contributed to significant changes in atmospheric composition through a...
Out gassing from volcanism, supplemented by gases produced during the late heavy bombardment of Earth by huge asteroids, produced the next atmosphere, consisting largely of nitrogen plus carbon dioxide and inert gases.
The constant re-arrangement of continents by plate tectonics influences the long-term evolution of the atmosphere. Carbon dioxide was transferred to and from large continental carbonate stores. Free oxygen did not exist in the atmosphere until about 2.4 billion years ago. The Great Oxygenation Event is shown by the end of the banded iron formations...
Air India offers flight booking to popular routes across the world. Whether you need a beach vacation, a mountain retreat, or a business trip, you can find your ideal flight here.
May 3, 2024 · Air, 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.
- The Editors of Encyclopaedia Britannica
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Oct 19, 2023 · Learn about the composition, properties, and effects of air, the invisible mixture of gases that surrounds Earth. Find out how air supports life, affects climate, and is used in various ways by humans and other organisms.
