استرجاع مجاني وسهل
أفضل العروض
استرجاع مجاني وسهلأفضل العروض
| الناشر | Obeikan Publishing |
| رقم الكتاب المعياري الدولي 10 | 6035039294 |
| اللغة | العربية |
| تاريخ النشر | 11-Oct-16 |
| رقم الكتاب المعياري الدولي 13 | 9786035039291 |
| تنسيق الكتاب | غلاف ورقي |
| وصف الكتاب | Oceans, islands and polar regions are highly interrelated; if any of these ecosystems undergo environmental changes, other systems will be affected. Human activities have undermined the ecological balance of the oceans, islands and polar regions. Global warming, for example, has been mainly caused by human activities and is one of the greatest threats to these systems, and may also lead to human suffering. |
| عدد الصفحات | 64 |
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