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الإتاحة
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المؤلفين
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أنواع المادة
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مواقع
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مواضيع
- Conservation of natu...
- Consumption (Economi...
- Developing countries...
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- Economic policy - En...
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- Environmental policy... [x]
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- Green movement
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- Poverty
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- Sustainable developm... [x]
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- sustainable Developm...
- أظهر المزيد
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