What types of emissions are common measurements during vehicle inspections?

During vehicle inspections, measurements of emissions typically focus on harmful pollutants that are known to contribute to air quality issues and health problems. CO2, or carbon dioxide, is a significant greenhouse gas emitted by vehicles. While it is not harmful in small amounts, its accumulation in the atmosphere is a major contributor to climate change.

Nitrogen oxides (NOx) are another critical measurement during inspections because they contribute to the formation of smog and acid rain, which can have detrimental environmental and health effects. These emissions are regulated due to their impact on air quality and public health, making their measurement during vehicle inspections essential for ensuring compliance with emissions standards.

Mileage and speed, while relevant to vehicle performance, do not directly relate to emissions measurements and thus are not typically the focus of inspections geared toward assessing environmental impact. Only measuring carbon monoxide (CO) would overlook other significant pollutants emitted by vehicles. Brake efficiency and tire pressure focus on safety rather than emissions. Therefore, the emphasis on CO2 and nitrogen oxides during inspections represents a comprehensive approach to monitoring the environmental impact of vehicles.