دانلود ماهنامه آموزشي آب ومحيط زيست شماره ۲

دانلود ماهنامه آموزشي  آب ومحيط زيست شماره ۳

برگرفته از سايت شبكه خبري آب ايران WNN.ir

forestry in iran

 The above map is an extract from the Global Forest Cover map produced as part of FRA 2000. Please refer to FRA Working Paper 19 for a background to the production of the map.

Temperate, semi-humid; semi-arid and arid forests cover about 12 400 000 ha. Over 90 percent of them are hardwoods.

Certain types of trees predominate in various geographical regions due to differences in temperature, moisture supply, soil conditions and elevation. Some of the forests have been destroyed or severely degraded. ...............

 http://www.fao.org/forestry/site/18314/en/irn/

        دانلود كنيد :

            پاور پوينت آموزشي "اكوسيستم بيابان "

            آلودگیهای زیست محیطی و محیط خانه

   متن کامل کنوانسیون حفاظت از محیط زیست

دریای خزر