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ID number:269974
Author:
Evaluation:
Published: 10.06.2006.
Language: English
Level: Secondary school
Literature: n/a
References: Not used
Extract

Air is the ocean we breathe. Air supplies us with oxygen, which is essential for our bodies to live. Air is 99.9% nitrogen, oxygen, water vapor and inert gases. Human activities can release substances into the air, some of which can cause problems for humans, plants, and animals. …

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