What percentage of air pollution is attributed to mobile combustion?

Mobile combustion refers to the emissions produced by vehicles, including cars, trucks, buses, and other forms of transportation that rely on combustion engines for power. A significant portion of air pollution, particularly in urban areas, stems from these mobile sources.

The reason the percentage is noted as being between 50-60% is due to the fact that transportation is a major contributor to pollutants such as nitrogen oxides (NOx), volatile organic compounds (VOCs), and particulate matter (PM). These pollutants are known to adversely impact air quality and contribute to health problems and environmental issues.

Portable combustion not only contributes directly to the emission of greenhouse gases but also has secondary effects, such as the formation of ground-level ozone and smog. This high percentage highlights the importance of addressing mobile sources when developing air quality management strategies and regulations. Recognizing the role of mobile combustion in air pollution informs policymakers and the public about the need for cleaner transportation technologies and improved fuel efficiency.