Petroleum industry and trade -- Political aspects 4 Foreign relations -- 3 Energy policy -- 2 Political aspects -- 2 World politics -- 2 Business cycles 1 more ... Drug control -- 1 Drug traffic -- 1 Economic aspects 1 Economic conditions -- 1 Economic forecasting 1 Effect of energy costs on 1 Energy industries -- 1 Environmental aspects 1 Foreign economic relations 1 History 1 History -- 1 Inflation (Finance) -- 1 Intelligence service -- 1 International economic relations 1 International economic relations -- 1 Investments 1 Military aspects 1 Military readiness -- 1 less ...