The veto was interposed by ecologists of UNO. In their opinion, several sorts of sturgeon are under the threat of extinction because of large popularity of delicacy on market. So, in September USA, which imports more than half of world volume of beluga caviar, introduced ban on its supply from Caspian Sea. By the way, circulation of legal black caviar trade amounts to $100 millions per year. Amount of delicacy, sold on black market, is 5 times more.