Poland Exports of coke, semi-coke of coal, of lignite, of peat; retort carbon to Cameroon was US$1.95 Million during 2013, according to the United Nations COMTRADE database on international trade. Poland Exports of coke, semi-coke of coal, of lignite, of peat; retort carbon to Cameroon - data, historical chart and statistics - was last updated on May of 2024.