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Information.

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Land surrounded by a thick sheath air called the atmosphere. The thickness of the atmosphere up to 1000 km, but its main mass is located at the bottom, in the first 10 km above the Earth.
Here, the most dense air. With increasing height above the Earth’s surface, its density decreases, converging to zero at the transition to space.

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Earth is surrounded by a shell of air thickness of several hundred kilometers. We live as if at the bottom of this huge aircraft "ocean". This "ocean" no beaches, it surrounds the entire globe.
A mixture of nitrogen, oxygen, carbon dioxide and some other (in small amounts) of gases and water vapor and dust – all this forms the air, without which life on Earth could not exist. On the surface of our body weighs no less than 16 tons of air.

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Experts estimate that reentry of the "UARS", nearly six tons, will take place on Friday and still can not pinpoint where.

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ATMOSPHERE (from the Greek. Atmos – pairs + sphaira – ball) – the gaseous envelope surrounding the Earth, the Sun, some planets and stars. A. Earth – a mechanical mixture of several fixed and variable components of gas, called air, and it contained solid and liquid aerosols, natural and technogenic origin, cloud elements and precipitation.

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Spraying of sulfate aerosols in the atmosphere, which can prevent global warming, significantly delaying time stretch the giant Antarctic ozone holes and the thickness will reduce the ozone shield over the Arctic.

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Ozone is a relatively unstable form of molecular.

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Is ionised air a signal for impending doom?

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Why do we see the sky as blue, is it really blue?

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Our planet is surrounded by an extensive atmosphere. In accordance with the temperature of the composition and physical properties of the atmosphere can be divided into different layers. Troposphere – a region that lies between Earth’s surface and a height of 11 km. It is quite thick and dense layer containing most of the water vapor in the air.