Oxygen: Human and animals need it to breath., 21% of the air, come out from the plants , Carbon dioxide : Plants need it in photosynthesis to make food, 1% of the air, come out from breathing and from burning, Nitrogen: Plants take it from soil , 78%,

Air composition

لوحة الصدارة

النمط البصري

الخيارات

تبديل القالب

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