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This paper estimates Nigeria biogas potential from livestock manure and its contribution to climate change mitigation. Findings reveal that Nigeria biogas potential from livestock manure represents a minimum of 1.62×109 m3 of biogas per annum. Replacing diesel fuel with methane derived from biogas to produce electricity as well as inorganic nitrogen fertilizer with organic nitrogen from the anaerobic digester for agricultural use will lead to carbon dioxide (CO2) emission savings of 683,600 t per annum. This amount represents the minimum contribution of biogas derived from livestock manure to climate change mitigation if harnessed for electricity and agricultural use in Nigeria. [ABSTRACT FROM AUTHOR]

The consequences of spatial association of CO 2 determinants are discussed in this analysis, considering pollution control's significance. Six financial growth metrics were analyzed using data from 31 Asia-Pacific countries from 2000 to 2018. The spatial econometric models used in this paper, in a novel contribution, make it possible to study comprehensively the direct and spillover effects of financial development on CO 2 emissions regionally. The presence of the spatial Durbin model was verified by diagnostic testing. The findings demonstrate that the logarithm of GDP per capita, trade openness, urbanization, and energy intensity have beneficial and essential effects on CO 2 emissions. The efficacy of the components assessed for financial growth in the various models. The lack of consideration of the spillover consequences of economic growth to boost energy quality, based on the findings, contributes to skewed estimates and negligible coefficients. The ultimate results illuminate that all six financial growth metrics are becoming relevant and stimulate an increase in CO 2 emissions, while their spillover effects are adverse as energy quality is increased. The analysis of spatial influences illustrates the importance of adjacent countries' effects on a country's CO 2 emissions. The overall findings suggest that as demand and financial growth in neighboring countries increase, CO 2 emissions decrease. • Financial development. • CO 2 emission. • Asia-Pacific Countries. • Spatial econometric. [ABSTRACT FROM AUTHOR]

In order to comply with stringent environmental regulations, shipbuilders and ship-owners are seeking cleaner fuels and the integration of renewable energy sources into ship power systems. Such solutions regularly result in additional costs for ship operators, both in the case of retrofitting existing ships or acquiring completely new vessels. This paper deals with the life-cycle cost assessments (LCCAs) of different power system configurations of a ro-ro passenger vessel operating in the Croatian short-sea shipping sector. Electrification of the ship is considered as an option to reduce the carbon footprint (CF) of the vessel and to achieve economic savings during its lifetime. In this sense, the ship operational profile is analysed and its total power needs are determined. The life-cycle assessments of an existing diesel engine-powered solution and two potential battery-powered ship options (with and without photovoltaic cells) are performed by means of GREET 2018 software. Furthermore, these options are compared from an economical viewpoint, where different carbon credit scenarios are investigated. The results show that a diesel engine-powered vessel has the highest carbon footprint, as expected. However, it is also found that a battery-powered vessel (with or without photovoltaic cells) has a minimum environmental footprint and at the same time represents economically the most favourable solution for all possible carbon allowance scenarios. This indicates that all-electric ships seem to be a promising option for the future development of the Croatian short-sea shipping sector. • The applicability of different power sources in short-sea shipping is investigated. • LCAs and LCCAs of different power options for ro-ro vessels are performed. • The influence of carbon credit policies in the marine sector is considered. • The electrification of the Croatian ro-ro fleet is a viable option to reduce the CF. [ABSTRACT FROM AUTHOR]