The Caspian sea (Xəzər dənizi) is no sea, it is the largest lake on the planet. It has no connection to an ocean, is 371,000 square kilometres large and one kilometre deep at the lowest point. Countries around the lake are Azerbaijan, Russia, Kazakhstan, Turkmenistan and Iran. The Caspian sea is an important economic resource for those countries; it is used for fishing but especially for gaining crude oil and natural gas.
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