Inventory of greenhouse gases emissions from gasoline and diesel consumption in Nigeria

Emissions from fossil fuel combustion are of global concern due to their negative effects on public health and environment. This paper is an inventory of the greenhouse gases (GHGs) released into the environment through consumption of fuels (gasoline and diesel) in Nigeria from 1980 to 2014. The fuel consumption data for the period in view were sourced from bulletins released by Nigeria National Petroleum Corporation, (NNPC) and were utilized for GHGs estimation based on default emission factors (69300 kg/TJ (CO 2 ; gasoline), 74100 kg/TJ (CO 2 ; diesel), 18 kg/TJ (CH 4 ; gasoline), 3.85 kg/TJ (CH 4 ; diesel), 1.9 kg/TJ (N 2 O; gasoline) and 2.25 kg/TJ (N 2 O; diesel). In addition, the uncertainty and sensitivity analyses associated with the inventory were carried out. Total amount of GHGs emitted into the environment for the period under consideration was 7.30 x 10 8 tCO 2e (5.20 x 10 8 tCO 2e and 2.10 x 10 8 tCO 2e of gasoline and diesel, respectively). It is worth noting that gasoline consumption accounted for 71.23% of the total amount of GHGs with CO 2 making up 98.72 % (CH 4 = 1.39 % and N 2 O = 0.61 %) of the emissions. For this study, uncertainty of estimate was between -80.93 % and 78.36 % while volume of diesel is more sensitive than the volume of gasoline of the input parameters. National policy and enforcement on low or neutral emission fuels utilization are amongst the recommended actions toward reducing GHG emissions in the country. Keywords: Emissions; inventory; petroleum products; greenhouse gases; carbon dioxide