Is the Clean Transportation Zone something that is a necessity and that should make its way into every major city, or has Warsaw rushed to ban drivers of older cars so harshly? The latest work by researchers leaves no illusions about this. Warsaw has introduced a Clean Transportation Zone in 2024, but the researchers propose alternative methods of monitoring exhaust emissions. A system of virtual sensors can accurately estimate CO₂ and NOx emissions based on drivers' driving styles, which could be crucial for cities battling air pollution.