Introduction

The Caspian region (including Golestan, Mazandaran, and Guilan provinces of Iran) is one of the most important Iranian zones with respect to domestic and international tourism. The Caspian Sea is the most outstanding natural feature in this region. Recreational benefits as well as commercial products, caviar in particular, are highly susceptible to environmental deterioration. In addition, the presence of valuable forests and grasslands, and the fact that this region is the only area in the country where important agricultural crops like rice, tea, and ...

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