The importance of steel is in no doubt. It is the material from which much of the modern world is made, from skyscrapers to washing machines. Governments everywhere regard a strong steelmaking business as a sign of economic virility, and thus hover anxiously over their domestic producers. A French minister recently threatened to nationalise ArcelorMittal's Florange plant if it pursued plans to cut jobs and close two blast furnaces. Despite a weak world economy, global production of steel rose by 1.2% last year to a record 1.55 billion tonnes.
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