Impact of energy poverty on public health: A non-linear study from an international perspective

Research on energy poverty and its impact has been quite extensive, but the impact of such poverty on public health is still lacking. This paper thus presents the relationship between energy poverty and public health of 185 countries from 2000 to 2020 as well as the role of urbanization development levels in this nexus. To achieve this goal, this study uses a partial linear function coefficient (PLFC) method to analyze the relationship between them, which can also clearly exhibit the non-linear impact of energy poverty on public health. First, both linear and non-linear regression results show that energy poverty has significantly negative impacts on public health. Second, urbanization level plays a significant moderating effect in the energy poverty and public health nexus, meaning that energy poverty affects public health under the influence of urbanization. According to the PLFC model results, countries that exceed the threshold of urbanization have significantly reduced the adverse effects of energy poverty on public health. Third, this study investigates the heterogeneous impact of energy poverty across different regions, comparing the Sub-Saharan Africa region with other areas. The results reveal in the Sub-Saharan Africa region that affordable energy under the influence of urbanization provides a new pathway for improving public health in that region, whereas this effect is considerably smaller in other regions. Additionally, a series of tests confirm the robustness of the results. This paper offers a reference for the development and implementation of renewable energy-related public health policies.