Five Caspian littoral countries signed the Framework Convention for the Protection of the Marine Environment of the Caspian Sea (Tehran Convention) On August 12, 2006 and this day is called International Day of the Caspian Sea.
Five Caspian littoral countries signed the Framework Convention for the Protection of the Marine Environment of the Caspian Sea (Tehran Convention) On August 12, 2006 and this day is called International Day of the Caspian Sea.