What is the primary purpose of vehicle emission control devices?

The primary purpose of vehicle emission control devices is to reduce environmental impact. These devices are designed to limit the release of harmful pollutants into the atmosphere, which can contribute to air quality issues and environmental degradation. By capturing and treating exhaust gases before they are emitted, these devices help ensure that vehicles comply with regulatory emissions standards, thus supporting public health and environmental conservation efforts. While emission control technologies can also have secondary benefits, such as improving fuel efficiency or sometimes affecting performance, their main intention is focused on mitigating the environmental damage caused by vehicular emissions.