The Future of the World Economy: A United Nations Study

abatement activities Africa agricultural alternative annual areas arid Asia assumed assumptions average balance Bauxite billion capital cent centrally planned changes coal coefficients commodity compared computed consumption Copper costs decades demand dependence developing countries developing regions domestic economic emissions endowments equations equipment estimates expected exports foreign future given grain gross product growth rates higher imports income increase industry inflows input investment Iron Japan land Latin America lead less levels low-income machinery manufacturing margins measures medium-income metal Middle East mineral resources Natural gas Nickel North America outflows output payments percentage petroleum policies pollution population present processes projected ratio relation relative remain requirements reserves residual scenario sector selected share solid waste specific structure tion tons trade tropical United Nations urban variables various Western Europe Zinc