The primary purpose of emission-control systems is to ____.reduce emissionsinject fuelreuse exhaustreduce fuel consumption

The primary purpose of emission-control systems is to reduce emissions.

Emission-control systems are critical components installed in vehicles and industrial equipment to minimize the release of harmful pollutants into the atmosphere. They work by treating exhaust gases before they exit the tailpipe. This is achieved through various technologies such as catalytic converters, which convert harmful gases like carbon monoxide, nitrogen oxides, and hydrocarbons into less harmful substances. Additionally, emission-control systems may include mechanisms for recirculating exhaust gases back into the engine (EGR systems) to lower combustion temperatures and reduce nitrogen oxide emissions. By focusing on reducing emissions, these systems help in meeting environmental regulations and protecting air quality, ultimately contributing to public health and climate change mitigation.