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Background: Worldwide environmental pollution has called for overwhelming concern of researchers and stakeholders in the last twenty years because of the menace it unlashes on man's life. The aim of this research work is to ascertain the causation among economic advancement, Carbon emission, energy consumption and taxation. The study focused on the Nigerian economic and the period under review is thirty-three (33) years. Methods: Test was performed to explain the accurate transmission among the dependent and the independent variables. This study employed Granger estimation to ascertain the direction of the connection amongst the variables. Result: Results revealed that tax has unidirectional connection with economic advancement. The result also showed that Carbon emission has unidirectional relationship with economic growth. The result further revealed that energy consumption has a unidirectional association with taxation. This study suggests that economic growth does not affect energy consumption, taxation and carbon emission. This study recommended that for future study, intending researchers should use fuel consumption to proxy energy consumption. The study also recommended that the Nigerian government should increase tax paid by oil companies in order to curtail their excesses and generate more revenue. [ABSTRACT FROM AUTHOR]

The study covered four (4) selected financial deepening estimators as it affects the economy as a whole. To carry out the study, data were sourced through Statistical Bulletin 2018 and World Bank Development Indicators (2018) from 2003 to 2018. Group of low-income countries have continued to find the need for adequate financial deepening in a bid to enhance their economic growth. Though they are operating a modern type of economy, yet they are mostly mono-economy, relying more on either oil or agricultural products and heavily depending on oil. Hence, Nigeria is a small open economy. In analyzing the data obtained, linear regression analysis was used through SPSS 22.0. The study formulated four (4) hypotheses and the findings showed that the ratio of money supply, credit ratio in private sector, savings ratio and investment have impact significantly on Gross Domestic Product in Nigeria because the p-value t-statistics are 0.0481, 0.027, 0.046 and.000 respectively are all less than 5% significant level. The study, therefore, identified the nexus by concluding that financial deepening has significant impact on Nigeria's economic growth. This study recommends that government policies should be geared towards increased money supply and well-organized capital market that can improve general economic efficacy. [ABSTRACT FROM AUTHOR]