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The ozone layer:

Is the athmosphere' s layer inthe stratosphere which acts like a filter, absorvs the UVA rays and it expels hot, because they can damage living things.

Ionosphere:

Is the atmosphere' s layer located between 80km-5000km high. The temperature there reaches 1500 degrees due to the sun' s rays. It's there where Aurora Boreal happens( It's a light phenomena green, red or rose in colour near magnetic poles), and it reflects radio waves.

Greenhouse effect:

It's a natural process that avoids cooling of the earth's surface. The erth's surface emits gases to the atmosphere and the earth recives sun rays and becomes hotter. Infrared radiation's earth are expeled to the atmosphere, but due to the gas layer this rays bounce to the surface's earth, increasing the global temperature , it causes climate change.