The ozone layer is a layer of concentrated ozone gas about 24 km (15 miles) up in the atmosphere. It protects us from the Sun's harmful ultra-violet rays. However, this vitally important layer is being destroyed through the use of aerosol cans containing chloro-fluoro-carbons or CFC's.

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Source: https://www.pitara.com/non-fiction-for-kids/did-you-know-for-kids/the-ozone-layer-is-a-layer-of-concentrated/

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