What notable trend regarding air pollution is observed in lower developed countries?

The observation that lower developed countries have the highest levels of air pollution aligns with various studies highlighting how these nations often lack comprehensive environmental regulations and enforcement mechanisms. In many cases, rapid industrialization and urbanization occur without adequate infrastructure or policies to manage and mitigate environmental impacts, leading to significant air quality issues. Additionally, reliance on outdated technologies and fossil fuels contributes to higher emissions of pollutants.

In contrast, higher-developed countries may implement stringent regulations and advanced technologies to control emissions, enabling them to maintain better air quality. The absence of effective pollution control measures in lower developed countries suggests that they grapple with legacy issues of industrial growth without balancing environmental stewardship, resulting in higher pollution levels.