This one is simple. Switch off your vehicle when pulled over. It is an easy way to protect public health and immediately improve local air quality.
There is a surprising amount of pollution that comes out of vehicles while idling. Engine idling contributes to asthma, heart disease and lung cancer because of the pollution put into the air from burning gas. It can even stunt young lungs.
Whether you are stopped waiting for a friend to jump in or are outside a school for pick up, simply turn off your engine to keep the fumes from building around you. Had no idea? No big deal. Now you can move forward with this simple new habit.