What is a likely effect of high emissions from vehicles?

High emissions from vehicles are strongly correlated with a variety of health issues, particularly respiratory problems. When vehicles emit pollutants such as nitrogen oxides, particulate matter, and volatile organic compounds, these contaminants can significantly degrade air quality. As air quality worsens, the population may experience an uptick in health issues, including asthma, chronic bronchitis, and other respiratory diseases. Populations that are more vulnerable, including children and the elderly, may experience heightened effects due to exposure to these pollutants. Therefore, the likelihood of increased respiratory health issues aligns directly with the negative impact that high vehicle emissions have on air quality and public health.

In contrast, improving air quality, decreasing fuel consumption, and boosting vehicle sales do not typically follow high emissions scenarios. Emissions are detrimental to air quality and public health; thus, the relationship is primarily negative.