There seems to be a vicious cycle between climate change and income inequality. Hence, this study examined the existence of a feedback relationship between climate change and income inequality in Nigeria. The study employed an annual data series for the period from 1980 to 2020. Income inequality was measured by Gini while climate change was captured by temperature. The upshot of the study revealed that there is a feedback substantial connectivity between climate change and income inequality. The impact of climate change on income inequality conformed to the U-shaped hypothesis. Other factors of climate change were population growth, economic development, and emission of carbon dioxide. Hence, the study pertinently advocates and recommends effective population control, reduction of income inequality through the provision of employment and education, and the supply of modern and efficient energy in the purse of economic growth and development.

The place of population growth in the linkage between the consumption of energy and economic development in Nigeria was examined in this study. Annual data on total consumption of energy, the growth of population, and economic development were employed among other variables for the time 1995 to 2019. We used Autoregressive Distributed Lag -Error Correction Model (ARDL-ECM). Energy consumption had a feedback negative substantial relationship with economic development in the long run while in the short run, energy consumption had a negative significant impact on economic development. The population growth had a negative significant impact on economic development, and a positive substantial effect on energy consumption. However, energy consumption is not impacted on by oil price. Consequently, we advocate for the increase in the quality of energy, increasing government expenditure in the provision of energy supply, and the population maximization of energy for the achievement of economic development in Nigeria.