Which of the following is an economic benefit of legislation on air pollution?

The correct answer highlights how legislation on air pollution can yield economic benefits by reducing healthcare costs associated with pollution. When air quality improves due to effective regulations, the incidence of health problems related to pollution, such as respiratory diseases and cardiovascular issues, decreases. This, in turn, can lead to significant savings in healthcare expenditures, benefiting both individuals and the healthcare system as a whole. Additionally, better air quality enhances overall public health, which can increase productivity and reduce absenteeism in the workplace.

The other options present different aspects of economic considerations but do not directly address the economic benefits resulting from improved air quality tied to legislation. Lowering taxes on gasoline, for instance, might not lead to environmental benefits and could encourage higher consumption of fossil fuels. While encouraging renewable energy investments and creating jobs in clean technology are positive outcomes related to environmental policies, they are not as directly tied to the immediate economic benefits from reduced healthcare costs due to better air quality.