When cruising the open road, by all means roll down your windows and feel the breeze. But when driving in cities or crawling in heavy highway traffic, keep them shut—and turn off your AC or heater, too. Do this, and you’ll slash the amount of toxic particles pouring into your car by a whopping 76 percent.
Thank researchers at the University of Surrey in England for this lung- and heart-saving tip. “Vehicles emit a number of gaseous pollutants, as well as particles of various sizes,” says lead investigator Prashant Kumar. “All of these are known to harm human health, including increasing risk of respiratory and cardiovascular diseases.” In fact, the World Health Organization has placed outdoor air pollution among its top 10 risks faced by humans, believing it to be linked to 7 million premature deaths every year.