This paper determines the Greenhouse gas emissions from combustion of fuel in Dana steel rolling mill Katsina, Nigeria. The result shows that the total carbon dioxide equivalent emission from combustion of the fuel oil for the year 2012 was 3,185.803 tonne at the rate of 0.1019 tonne of carbon dioxide per tonne of steel product (tC/t). In the years 2013 and 2014 the CO 2e emissions were 1,853.101 tonne and 556.224 tonne at rate of 0.0970 tC/t and 0.0849 tC/t respectively, while in the year 2015

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... the carbon dioxide emissions was 2,173.599 tonne at rate of 0.1533 tC/t of product. The trend of carbon intensity follows the trend of energy intensity and can be compared with what is obtained in the South East Asian (ASEAN) nation's bench mark for GHGs intensity in iron and steel industry for hot rolling of long steel products.