👉 Vehicle exhaust fumes, often referred to as "fumes," are a mixture of gases and particulate matter released from engines, particularly those running on gasoline or diesel fuel. These emissions include carbon monoxide (CO), nitrogen oxides (NOx), volatile organic compounds (VOCs), and particulate matter (PM). CO is a colorless, odorless gas that can be harmful if inhaled in high concentrations, while NOx contributes to smog and acid rain. VOCs can react with other pollutants in the presence of sunlight to form ground-level ozone, a key component of smog. Particulate matter, which consists of tiny particles suspended in the air, can penetrate deep into the lungs and even enter the bloodstream, posing health risks such as respiratory issues and cardiovascular problems. Modern vehicles are equipped with catalytic converters and other emission control technologies to reduce these harmful emissions, but fumes remain a concern for air quality and public health.