Lahore introduces a pilot emissions testing program for four-wheeled vehicles to address air quality issues.Vehicle testing program provides a green QR-coded sticker for compliant vehicles but excludes two- and three-wheelers.Critics voice concerns over limited scope, emphasizing the need to include all types of vehicles in emission testing.Experts stress the importance of transitioning to Euro V fuel and engine standards for a more effective long-term solution to Lahore's air pollution.