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The Earth's atmosphere (The different layers of the atmosphere (The…
The Earth's atmosphere
The atmosphere begins at the earth's surface and ends at an altitude of 10,000 km, but it is approximate since the gases in the atmosphere disappear as the altitude increases
The atmosphere is composed of air, and other solid and liquid particles, such as pollen. Also, it has a variable amount of water called atmospheric humidity
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Air
Is composed by nitrogen (78%), oxygen (21%), and carbon dioxide, ozone and argon (1%)
Air is affected by the heat:
- When the air heats up, it moves away from the Earth, and the temperature decreases.
- When the air is cooler, move back to the surface.
Relative humidity is the amount of water the air has. Warmer air can have more water vapor, but all air temperatures have a maximum of water vapor. If that maximum is exceeded, the vapor condenses and clouds form
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Our atmosphere protects us from the Sun. Some ultraviolet rays are essential to some processes like photosynthesis and respiration, but other, are dangerous for us. However, ozone layer absorbs most of the ultraviolet rays
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Atmospheric pollution occurs when harmful material or energy enters in the atmosphere. The natural atmospheric pollution consists in harmful materials that are in the air enters in the atmosphere, but some of them aren't naturally, so they're caused by humans
Human activity
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Noise pollution: excess of sound energy created by noises of (for example) emergency service sirens.
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