9Wahem N.Steel industry launches global CO2 emissions data collection programme[EB/OL].(2008-04-15)[2009-8-19].http://www.worldsteel.org/index.php?action=newsdemil & id=238.
10World Steel Association.Nothing is more important than the safety and health of the people who work in the steel industry[EB/OL].(2009-8-24)[2009-11-20].http://www.worldsteel.org/index.php?action=storypages&id=271.