This paper tests the pollution emissions and institutional quality nexus in Africa. Specifically, we analyze the effect of the political regime and the quality of political governance on CO2 emissions. To control for endogeneity, we apply the system generalized method of moments on a dynamic panel of African countries over the period 1996–2020. The key finding suggests that better institutions have a negative and significant effect on pollution in Africa. The findings also validate the environmental Kuznets curve hypothesis. Moreover, the results support the pollution haven hypothesis. Finally, if digitalization significantly curbs pollution, then industrialization, natural resources, as well as the intensive use of energy, are considered as positive predictors. All the sensitivity and robustness tests globally validate the strength of the negative association between the good quality of institutions and the level of polluting emissions in Africa. The results call for some policy recommendations in environmental regulation for African economies.

This paper proposes a dynamic model to capture the interaction among the environment, human capital accumulation, and economic growth. We emphasize the mechanism that pollution stock depresses human capital accumulation, which has received increasing support from empirical studies. The model predicts that the development of pollution-intensive industries can help an economy gear up a short-run prosperity, but it impairs the capability for long-run economic growth, trapping the economy at a low development level. The cost for a dirty economy to switch is expensive and even infeasible if the environmental degradation is irreversible. Policy interventions, such as tax on pollution and subsidy on human capital, can help alleviate but cannot eradicate the economic stagnation.

This paper investigates whether pollution-intensive industries develop faster in a time of economic downturn. Using firm-level panel data from 2005 to 2013, we find supporting empirical results in an analysis of China's manufacturing industries in the 2008 economic crisis. We find that pollution-intensive firms tended to produce more compared with non-pollution-intensive firms in the 2008 economic crisis, with the pre-crisis period as a baseline. We further find that this effect is more pronounced in areas with higher export dependence and a smaller proportion of production from pollution-intensive industries. The relatively faster production expansion in pollution-intensive industries is more evident for state-owned enterprises.

The importance of forest conservation in the fight against emissions from deforestation and forest degradation has led to reexamination of the deforestation and economic development relationship. For this purpose, we use the recent method of long-term growth rate developed by Stern et al. (2017) on 85 tropical developing countries over the period 1990–2010. Results show that the EKC is not significant. However, we find a beta convergence across developing countries in terms of deforestation per capita. In other words, these countries converge in terms of policies that prevent deforestation and forest degradation. This implies that, just as with growth effects, beta convergence effects are also important in explaining changes in forest cover in tropical developing countries. The convergence effect in forest cover change may be consistent with the forest transition hypothesis.

This paper explores the driving forces behind household waste generation in the Portuguese municipalities. The focus of the analysis is to empirically test the validity of the waste Kuznets curve (wKc) hypothesis, which postulates an inverted U-shaped relationship between waste generation and economic activity. Panel data is collected for 307 municipalities over the 2009–2018 period. Estimating the fixed-effects model and its dynamic versions of the waste generation equation, the decoupling hypothesis is confirmed, although it is only observed in the richest region of Lisbon and three other municipalities. Results suggest that the productive structure of the local economies is important for explaining waste generation behavior. Population ageing contributes negatively to waste generation, while population density and the development dichotomy are not important drivers in this process. Finally, tourism inflows have a positive effect on municipal waste generation, although the size of the impact is minimal.

This paper contributes to the literature on the determinants of environmental standards by studying the role of income inequality and freedom of the press. Given that evidence of the environmental Kuznets curve has only been found for some countries, it is thus crucial to investigate whether other factors besides income per capita levels may be affecting countries' decisions to pass environmentally-friendly legislation. We investigate the effects that inequality and freedom of the press have on environmental stringency for a sample of OECD and BRIICS countries and a global sample of 82 countries using data over the period 1994–2015. We hypothesize that the more unequal a society is, and the greater the oppression of the press is, the less stringent environmental policies are. The results partially confirm our hypothesis. In particular, lack of press freedom is negatively correlated with environmental stringency, whereas inequality shows a non-linear effect only for non-high-income countries.

Using U.S. state-level data for the period 1973–1994, this study models the relationship between emissions, output and pollution abatement by defining an emissions function, in a manner that is consistent with the residual (emissions) generation mechanism and firms' optimizing behavior. It thus accounts for factors that were previously unaccounted for or addressed only individually. Applications using this comprehensive setting can offer more informed insights for policy-making, something that is particularly useful for developing countries that face the environmental degradation that comes together with the benefits of economic growth. Using nonparametric econometric techniques as well as threshold regression, the empirical results show that there is a positive nonlinear relationship between emissions and output, rejecting an inverted-U type of relationship between the two (the Environmental Kuznets Curve, or EKC). In the absence of abatement the relationship turns around, verifying the arguments in the literature that abatement is one of the driving forces for an EKC to emerge.

This study examines the relationship between urban forests and household income and population density in the 149 cities with populations over 40,000 in nine southeastern states. Our empirical results show that urban forest percentage across the cities has characteristics of the environmental Kuznets curve. We find that household income around $39,000 is a threshold that changes the relationship between income and urban forest coverage from negative to positive, whereas the impact of population density on urban forests is just the opposite, from positive to negative when population density is around 180 persons per square kilometer.

This study utilized a semiparametric panel model to estimate environmental Kuznets curves (EKC) for carbon dioxide (CO2) in 15 Latin American countries, using hitherto unused data on forestry acreage in each country. Results showed an N-shaped curve for the region; however, the shape of the curve is sensitive to the removal of some groups of countries. Specification tests support a semiparametric panel model over a parametric quadratic specification.

The environmental Kuznets curve (EKC) is a hypothesis stating that pollution rises with income at low income levels but falls at higher ones. We analyse the EKC in a representative consumer model in which pollution is generated by consumption and can be abated. We show that at low income levels no abatement is optimal and pollution increases with income. Once abatement expenditures are positive, we demonstrate that satiation in consumption is not only sufficient to find an EKC, but a tendency to satiation—or in other words the condition that environmental quality is a normal good—is even necessary if we assume a standard functional form for the pollution function. Finally, we reconsider the results of two related models of the literature: We verify that the relationship between the income elasticity of demand for environmental quality and the EKC is ambiguous.

(JEL: D62, O40, Q20)