اعمل حاجه من اجل الحفاظ على البيئه من التلوث
Uploaded on 3/19/2012
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Learning objectives
- مصادر الطاقه الطبيعيه والغير متجددة
- اسباب التلوث
- تاثير التلوث على كل من حه الانسان والكرة الارضيه
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